Immorality is evil, sinful, or otherwise wrong behavior. Immorality is often called wickedness and is a state avoided by good people.

Proverbs 5King James Version

5 My son, attend unto my wisdom, and bow thine ear to my understanding:

² That thou mayest regard discretion, and that thy lips may keep knowledge.

³ For the lips of a strange woman drop as an honeycomb, and her mouth is smoother than oil:

⁴ But her end is bitter as wormwood, sharp as a two-edged sword.

⁵ Her feet go down to death; her steps take hold on hell.

⁶ Lest thou shouldest ponder the path of life, her ways are moveable, that thou canst not know them.

⁷ Hear me now therefore, O ye children, and depart not from the words of my mouth.

⁸ Remove thy way far from her, and come not nigh the door of her house:

⁹ Lest thou give thine honour unto others, and thy years unto the cruel:

¹⁰ Lest strangers be filled with thy wealth; and thy labours be in the house of a stranger;

¹¹ And thou mourn at the last, when thy flesh and thy body are consumed,

¹² And say, How have I hated instruction, and my heart despised reproof;

¹³ And have not obeyed the voice of my teachers, nor inclined mine ear to them that instructed me!

¹⁴ I was almost in all evil in the midst of the congregation and assembly.

¹⁵ Drink waters out of thine own cistern, and running waters out of thine own well.

¹⁶ Let thy fountains be dispersed abroad, and rivers of waters in the streets.

¹⁷ Let them be only thine own, and not strangers’ with thee.

¹⁸ Let thy fountain be blessed: and rejoice with the wife of thy youth.

¹⁹ Let her be as the loving hind and pleasant roe; let her breasts satisfy thee at all times; and be thou ravished always with her love.

²⁰ And why wilt thou, my son, be ravished with a strange woman, and embrace the bosom of a stranger?

²¹ For the ways of man are before the eyes of the Lord, and he pondereth all his goings.

²² His own iniquities shall take the wicked himself, and he shall be holden with the cords of his sins.

²³ He shall die without instruction; and in the greatness of his folly he shall go astray.

Proverbs 6King James Version

6 My son, if thou be surety for thy friend, if thou hast stricken thy hand with a stranger,

² Thou art snared with the words of thy mouth, thou art taken with the words of thy mouth.

³ Do this now, my son, and deliver thyself, when thou art come into the hand of thy friend; go, humble thyself, and make sure thy friend.

⁴ Give not sleep to thine eyes, nor slumber to thine eyelids.

⁵ Deliver thyself as a roe from the hand of the hunter, and as a bird from the hand of the fowler.

⁶ Go to the ant, thou sluggard; consider her ways, and be wise:

⁷ Which having no guide, overseer, or ruler,

⁸ Provideth her meat in the summer, and gathereth her food in the harvest.

⁹ How long wilt thou sleep, O sluggard? when wilt thou arise out of thy sleep?

¹⁰ Yet a little sleep, a little slumber, a little folding of the hands to sleep:

¹¹ So shall thy poverty come as one that travelleth, and thy want as an armed man.

¹² A naughty person, a wicked man, walketh with a froward mouth.

¹³ He winketh with his eyes, he speaketh with his feet, he teacheth with his fingers;

¹⁴ Frowardness is in his heart, he deviseth mischief continually; he soweth discord.

¹⁵ Therefore shall his calamity come suddenly; suddenly shall he be broken without remedy.

¹⁶ These six things doth the Lord hate: yea, seven are an abomination unto him:

¹⁷ A proud look, a lying tongue, and hands that shed innocent blood,

¹⁸ An heart that deviseth wicked imaginations, feet that be swift in running to mischief,

¹⁹ A false witness that speaketh lies, and he that soweth discord among brethren.

²⁰ My son, keep thy father’s commandment, and forsake not the law of thy mother:

²¹ Bind them continually upon thine heart, and tie them about thy neck.

²² When thou goest, it shall lead thee; when thou sleepest, it shall keep thee; and when thou awakest, it shall talk with thee.

²³ For the commandment is a lamp; and the law is light; and reproofs of instruction are the way of life:

²⁴ To keep thee from the evil woman, from the flattery of the tongue of a strange woman.

²⁵ Lust not after her beauty in thine heart; neither let her take thee with her eyelids.

²⁶ For by means of a whorish woman a man is brought to a piece of bread: and the adultress will hunt for the precious life.

²⁷ Can a man take fire in his bosom, and his clothes not be burned?

²⁸ Can one go upon hot coals, and his feet not be burned?

²⁹ So he that goeth in to his neighbour’s wife; whosoever toucheth her shall not be innocent.

³⁰ Men do not despise a thief, if he steal to satisfy his soul when he is hungry;

³¹ But if he be found, he shall restore sevenfold; he shall give all the substance of his house.

³² But whoso committeth adultery with a woman lacketh understanding: he that doeth it destroyeth his own soul.

³³ A wound and dishonour shall he get; and his reproach shall not be wiped away.

³⁴ For jealousy is the rage of a man: therefore he will not spare in the day of vengeance.

³⁵ He will not regard any ransom; neither will he rest content, though thou givest many gifts.

David committing adultery in the bible
Bathsheba was a daughter of Eliam and was probably of noble birth. A beautiful woman, she became pregnant after David saw her bathing on a rooftop and had her brought to him. … David married the widowed Bathsheba, but their first child died as punishment from God for David’s adultery and murder of Uriah.

Spouse: Uriah the HittiteParents: EliamLeviticus 20:10 subsequently prescribes capital punishment for adultery, but refers to adultery between a man and a married woman: And the man that committeth adultery with another man’s wife, even he that committeth adultery with his neighbor’s wife, the adulterer and the adulteress shall surely be put to death. 

In the gospels, Jesus affirmed the commandment against adultery and seemed to extend it, saying, “But I say to you, anyone who looks on a woman to lust after her has committed adultery with her already in his heart.” He taught his audience that the outward act of adultery does not happen apart from sins of the heart: ” 

Deuteronomy 22:22–25 states: 22If a man be found lying with a woman married to an husband, then they shall both of them die, both the man that lay with the woman, and thewoman: so shalt thou put away evil from Israel.
In the King James Version of the Bible the text reads: But I say unto you, That whosoever shall put away his wife, saving. for the cause of fornication, causeth her to commit adultery: and. whosoever shall marry her that is divorced committeth adultery.

Remarriage after divorce is always labeled by God as a sin or specifically as an act of adultery (Deuteronomy 24:1-4, Malachi 2:14-16, Matthew 5:32, Matthew 19:3-10, Mark 10:1-12, Romans 7:1-3, 1 Corinthians 7).

The Seventh Commandment is a commandment to cherish and honor marriage. the seventh Commandment also forbids adultery. When you understand what marriage is, then the horror of adultery becomes plain.
Leviticus 20:10 subsequently prescribes capital punishment for adultery, but refers to adultery between a man and a married woman: And the man that committeth adultery with another man’s wife, even he that committeth adultery with his neighbor’s wife, the adulterer and the adulteress shall surely be put to death.