Once Messenger of Allah ﷺ visited us in this house of ours and asked for something to drink. We milked one of our sheep and mixed it with water from this well of ours and gave it to him. Abu Bakr was sitting on his left side and ʿUmar in front of him and a bedouin on his right side. When Messenger of Allah ﷺ finished, ʿUmar said to Messenger of Allah ﷺ "Here is Abu Bakr." But Messenger of Allah ﷺ gave the remaining milk to the bedouin and said twice, "The (persons on the) right side! So, start from the right side." Anas added, "It is a Sunna (the Prophet's traditions)" and repeated it thrice.  

سَمِعْتُ أَنَسًا ؓ يَقُولُ أَتَانَا رَسُولُ اللَّهِ ﷺ فِي دَارِنَا هَذِهِ فَاسْتَسْقَى فَحَلَبْنَا لَهُ شَاةً لَنَا ثُمَّ شُبْتُهُ مِنْ مَاءِ بِئْرِنَا هَذِهِ فَأَعْطَيْتُهُ وَأَبُو بَكْرٍ عَنْ يَسَارِهِ وَعُمَرُ تُجَاهَهُ وَأَعْرَابِيٌّ عَنْ يَمِينِهِ فَلَمَّا فَرَغَ قَالَ عُمَرُ هَذَا أَبُو بَكْرٍ فَأَعْطَى الأَعْرَابِيَّ ثُمَّ قَالَ الأَيْمَنُونَ الأَيْمَنُونَ أَلاَ فَيَمِّنُوا قَالَ أَنَسٌ فَهْىَ سُنَّةٌ فَهْىَ سُنَّةٌ ثَلاَثَ مَرَّاتٍ  

[Machine] The Messenger of Allah ﷺ set out with Abu Bakr, Umar, and a group of Bedouins until he entered our house. A sheep was slaughtered for him and water from our well was poured for him. I thought he would say some words, but he drank the water and Abu Bakr was on his left, Umar was facing him, and a Bedouin was on his right. Umar said, "O Messenger of Allah, Abu Bakr!" So the Bedouin gave it to Abu Bakr, and the right-hand side people said, "He (Abu Bakr) should give it to us." Anas said, "So it became a Sunnah." It became a Sunnah.  

انْطَلَقَ رَسُولُ اللهِ ﷺ وَمَعَهُ أَبُو بَكْرٍ الصِّدِّيقُوَعُمَرُ وَنَاسٌ مِنَ الْأَعْرَابِ حَتَّى دَخَلَ دَارَنَا فَحُلِبَتْ لَهُ شَاةٌ وَشُنَّ عَلَيْهِ مِنْ مَاءِ بِئْرِنَا حَسِبْتُهُ قَالَ فَشَرِبَ وَأَبُو بَكْرٍ عَنْ يَسَارِهِ وَعُمَرُ مُسْتَقْبِلُهُ وَعَنْ يَمِينِهِ أَعْرَابِيٌّ فَقَالَ عُمَرُ يَا رَسُولَ اللهِ أَبُو بَكْرٍ فَأَعْطَاهُ الْأَعْرَابِيَّ وَقَالَ الْأَيْمَنُونَ قَالَ فَقَالَ لَنَا أَنَسٌ فَهِيَ سُنَّةٌ فَهِيَ سُنَّةٌ