(19) باب قَبُولِ الصَّدَقَةِ مِنَ الْكَسْبِ الطَّيِّبِ وَتَرْبِيَتِهَا
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
O people, Allah is Good and He therefore, accepts only that which is good. And Allah commanded the believers as He commanded the Messengers by saying: "O Messengers, eat of the good things, and do good deeds; verily I am aware of what you do" (xxiii. 51). And He said: "O those who believe, eat of the good things that We gave you" (ii. 172). He then made a mention of a person who travels widely, his hair disheveled and covered with dust. He lifts his hand towards the sky (and thus makes the supplication): "O Lord, O Lord," whereas his diet is unlawful, his drink is unlawful, and his clothes are unlawful and his nourishment is unlawful. How can then his supplication be accepted?
Reference: Sahih Muslim 1015
In-book reference: Book 12, Hadith 83
USC-MSA web (English) reference(deprecated numbering scheme): Book 5, Hadith 2214