(31) باب فِي الْمَشِيئَةِ وَالإِرَادَةِ
Narrated Abu Musa:
Whenever a beggar or a person in need of something came to the Prophet (ﷺ) , he used to say (to his companions), "Intercede (for him) and you will be rewarded for that, and Allah will fulfill what He will through His Apostle's tongue."
Reference: Sahih al-Bukhari 7476
In-book reference: Book 97, Hadith 102
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 93, Hadith 568