Genesis 18:17, 20-21

The LORD said, “Shall I keep secret from Abraham [My friend and servant] what I am going to do, [Gal 3:8]

And the LORD said, “The outcry [of the sin] of Sodom and Gomorrah is indeed great, and their sin is exceedingly grave. I will go down now, and see whether they have acted [as vilely and wickedly] as the outcry which has come to Me [indicates]; and if not, I will know.”