Allah is good, accepts only good

Arabic

إِنَّ اللَّهَ طَيِّبٌ لَا يَقْبَلُ إِلَّا طَيِّبًا، وَإِنَّ اللَّهَ أَمَرَ الْمُؤْمِنِينَ بِمَا أَمَرَ بِهِ الْمُرْسَلِينَ …

Translation

Allah is Pure and accepts only what is pure. He commanded the believers with what He commanded the messengers. Then he mentioned a man on a long journey, dishevelled and dusty, raising his hands to the sky saying 'O Lord, O Lord!' — yet his food is ḥarām, his drink is ḥarām, his clothing is ḥarām, and he is nourished by the ḥarām — so how could his dua be answered?

Narrator

Abū Hurayrah

Source

Muslim 1015

Commentary

The acceptance of worship depends on the acceptance of the worshipper; the acceptance of the worshipper depends on the sources of his food, clothing and income. Ḥarām earnings corrode not just the heart but the dua.