Sahih Muslim Book - 36, Hadith - 5289

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى ، قَالَ : قَرَأْتُ عَلَى مَالِكٍ ، عَنِ ابْنِ شِهَابٍ ، عَنْ أَنَسِ بْنِ مَالِكٍ ، أَنَّ رَسُولَ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أُتِيَ بِلَبَنٍ قَدْ شِيبَ بِمَاءٍ ، وَعَنْ يَمِينِهِ أَعْرَابِيٌّ ، وَعَنْ يَسَارِهِ أَبُو بَكْرٍ ، فَشَرِبَ ثُمَّ أَعْطَى الأَعْرَابِيَّ ، وَقَالَ: الأَيْمَنَ فَالأَيْمَنَ.

It was narrated from Anas bin Malik that some milk that had been mixed with water was brought to the Messenger of Allah (s.a.w), and to his right was a Bedouin, and to his left was Abu Bakr. He drank some, then he gave it to the Bedouin, and said: "To the (immediate) right then to the next on the right."