كتاب البر والصلة والآداب
45  
The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship
(44)
Chapter: It Is Recommend To Intercede With Regard To That Which Is Not Unlawful
(44)
باب اسْتِحْبَابِ الشَّفَاعَةِ فِيمَا لَيْسَ بِحَرَامٍ ‏ ‏
Sahih Muslim 2627

Abu Musa reported that when any needy (person) came to Allah's Messenger (ﷺ) with a need he commanded him to his Companions, saying:

Make a recommendation for him, and you would get the reward. Allah, however, gives the verdict through the tongue of His Apostle what He likes most.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَلِيُّ بْنُ مُسْهِرٍ، وَحَفْصُ بْنُ غِيَاثٍ، عَنْ بُرَيْدِ، بْنِ عَبْدِ اللَّهِ عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا أَتَاهُ طَالِبُ حَاجَةٍ أَقْبَلَ عَلَى جُلَسَائِهِ فَقَالَ ‏ "‏ اشْفَعُوا فَلْتُؤْجَرُوا وَلْيَقْضِ اللَّهُ عَلَى لِسَانِ نَبِيِّهِ مَا أَحَبَّ ‏"‏ ‏.‏
Reference : Sahih Muslim 2627
In-book reference : Book 45, Hadith 188
USC-MSA web (English) reference : Book 32, Hadith 6360
  (deprecated numbering scheme)