An-Nawawi Hadith - 10

إِنَّ اللهَ تَعَالَى طَيِّبٌ لاَ يَقْبَلُ إِلاَّ طَيِّباً، وَإِنَّ اللهَ أَمَرَ الْمُؤْمِنِينَ بِمَا أَمَرَ بِهِ الْمُرْسَلِينَ، فَقَالَ تَعَالَى: يَا أَيُّهَا الرُّسُلُ كُلُوا مِنَ الطَّيِّبَاتِ وَاعْمَلُوا صَالِحًا وَقَالَ تَعَالَى: يَا أَيُّهَا الَّذِينَ آمَنُواْ كُلُواْ مِن طَيِّبَاتِ مَا رَزَقْنَاكُمْ ثُمَّ ذَكَرَ الرَّجُلَ يُطِيلُ السَّفَرَ، أَشْعَثَ أَغْبَرَ، يَمُدُّ يَدَيْهِ إِلَى السَّمَاءِ: يَا رَبُّ؛ يَارَبُّ؛ وَمَطْعَمُهُ حَرَامٌ، وَمَشْرَبُهُ حَرَامٌ، وَمَلْبَسُهُ حَرَامٌ، وغُذِيَ بِالْحَرَامِ؛ فَأَنّى يُسْتَجَابُ لَهُ رَوَاهُ مُسْلِمٌ

Abu Hurairah, radiyallahu 'anhu, reported that the Messenger of Allah, sallallahu ‘alayhi wasallam, said: "Verily Allah the Exalted is pure. He does not accept but that which is pure. Allah commands the believers with what He commanded the Messengers. Allah the Almighty has said: "O you Messengers! Eat of the good things and act righteously" [23:51-53]. And Allah the Almighty also said: "O you who believe! Eat of the good things that We have provided you with" [2:167-172]. Then he (the Prophet) mentioned (the case of) the man who, having journeyed far, is disheveled and dusty and who stretches out his hands to the sky (saying): "O Lord! O Lord!" (while) his food was unlawful, his drink was unlawful, his clothing was unlawful, and he is nourished with unlawful things, so how can he be answered?" [Muslim]