(Al-Ahraf) 7 : 81
إِنَّكُمْ لَتَأْتُونَ الرِّجَالَ شَهْوَةً مِنْ دُونِ النِّسَاءِ ۚ بَلْ أَنْتُمْ قَوْمٌ مُسْرِفُونَ
"Indeed, you are approaching men for lust instead of women. Nay, you are a transgressed people beyond the bounds".
The people of Prophet Looth who lived in Sodom were doing sodomy (homosexual) which was against nature. Prophet Looth warned them to avoid that shameful and filthy deed that no one in the world had done before. The Lord has created males and females as pairs to fulfill their sexual passion.