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The Bible and the Quran agree: Lot was a just and righteous man
Here's what the Bible says:
God ... delivered just Lot ... that righteous man. 2 Peter 2:4-8
And here's the Quran:
And unto Lot we gave judgment and knowledge... And We brought him in unto Our mercy. Lo! he was of the righteous. Quran 21:74-75
And Ishmael and Elisha and Jonah and Lot. Each one (of them) did We prefer above (Our) creatures ... We chose them and guided them unto a straight path. Quran 6:87-88