Tafsir Ibn Kathir
7:82 - 7:82

إِنَّهُمْ أُنَاسٌ يَتَطَهَّرُونَ

("These are indeed men who want to be pure (from sins)!") Qatadah commented, "They shamed them (Lut and the believers) with what is not a shame at all." Mujahid commented, "(Lut's people said about Lut and the believers,) They are a people who want to be pure from men's anuses and women's anuses!" Similar was narrated from Ibn `Abbas.