(20) باب جَوَازِ اسْتِتْبَاعِهِ غَيْرَهُ إِلَى دَارِ مَنْ يَثِقُ بِرِضَاهُ بِذَلِكَ وَيَتَحَقَّقُهُ تَحَقُّقًا تَامًّا وَاسْتِحْبَابِ الاِجْتِمَاعِ عَلَى الطَّعَامِ
Anas b Malik reported:
Abu Talha sent me to Allah's Messenger (ﷺ) ; the rest of the hadith is the same, but 'there is a slight variation of wording that he said at the end (The Holy Prophet) took what was left (of the food) and collected it and then invoked blessings upon it and it returned to its original state. He (the Holy Prophet) then said Take this.
Reference: Sahih Muslim 2040 c
In-book reference: Book 36, Hadith 192
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5060