Genesis 13:

¹³But the men of Sodom were wicked and sinners before the LORD exceedingly.

Genesis 18:

20And the LORD said, Because the cry of Sodom and Gomorrah is great, and because their sin is very grievous; 

Mathew 18:

⁴Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven. ⁵And whoso shall receive one such little child in my name receiveth me. ⁶But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.

 Deuteronomy 32:

29 O, that they were wise, that they understood this, that they would consider their latter end! ³⁰How should one chase a thousand, and two put ten thousand to flight, except their Rock had sold them, and the LORD had shut them up? ³¹For their rock is not as our Rock, even our enemies themselves being judges. ³²For their vine is of the vine of Sodom, and of the fields of Gomorrah: their grapes are grapes of gall, their clusters are bitter: ³³Their wine is the poison of dragons, and the cruel venom of asps. ³⁴Is not this laid up in store with me, and sealed up among my treasures? ³⁵To me belongeth vengeance, and recompense; their foot shall slide in due time: for the day of their calamity is at hand, and the things that shall come upon them make haste. 

Isaiah 1:

10Hear the word of the LORD, ye rulers of Sodom; give ear unto the law of our God, ye people of Gomorrah. 

Isaiah 3:

9The show of their countenance doth witness against them; and they declare their sin as Sodom, they hide it not. Woe unto their soul! for they have rewarded evil unto themselves. ¹⁰Say ye to the righteous, that it shall be well with him: for they shall eat the fruit of their doings. ¹¹Woe unto the wicked! it shall be ill with him: for the reward of his hands shall be given him. ¹²As for my people, children are their oppressors, and women rule over them.

Jeremiah 23:

¹¹For both prophet and priest are profane; yea, in my house have I found their wickedness, saith the LORD.  1²Wherefore their way shall be unto them as slippery ways in the darkness: they shall be driven on, and fall therein: for I will bring evil upon them, even the year of their visitation, saith the LORD. ¹³And I have seen folly in the prophets of Samaria; they prophesied in Baal, and caused my people Israel to err. ¹⁴I have seen also in the prophets of Jerusalem an horrible thing: they commit adultery, and walk in lies: they strengthen also the hands of evildoers, that none doth return from his wickedness: they are all of them unto me as Sodom, and the inhabitants thereof as Gomorrah. 

Leviticus 18

The Laws of Sexual Immorality