Abdullah bin Busr reported,
The Messenger of Allah ﷺ came to Ubayy and stayed as his guest, or Ubayy said to him, "Stay with me." He brought him some food, a dish of haysah, and sawiq, and he ate from it. He used to eat dates and discard the pits, and he indicated with his two fingers, the index and the middle, with their backs facing his mouth. Then he brought him a drink, and he drank, then handed it to the one on his right. Then a man stood up, took hold of the bridle of his mount, and said, "Pray to Allah 
for me."He said, "O Allah, bless them in what You have provided them, forgive them, and have mercy on them."
Ahmad 17683
Sahihحدثنا عفان حدثنا شعبة عن يزيد بن خمير
عن عبد الله بن بسر قال
جاء رسول الله ﷺ إلى أبي فنزل عليه أو قال له أبي انزل علي قال فأتاه بطعام وحيسة وسويق فأكله وكان يأكل التمر ويلقي النوى وصف بأصبعيه السبابة والوسطى بظهرهما من فيه ثم أتاه بشراب فشرب ثم ناوله من عن يمينه فقام فأخذ بلجام دابته فقال ادع الله عز وجل لي فقال اللهم بارك لهم فيما رزقتهم واغفر لهم وارحمهم
Its isnad is sahih, it was mentioned previously at 17604.17614m - Shubah narrated to us, he said, Yazid bin Khumayr informed me, he said, I heard Abdullah bin Busr say, the Messenger of Allah ﷺ stayed as a guest of my father, or he said, my father said to the Messenger of Allah ﷺ, "Stay as my guest." So he stayed with him, and my father brought him food, or dates mixed with something, and he ate. Then he brought him a drink, and he drank. Then he passed it to the one on his right.He said, when he ate, he would toss aside the date pit. Shubah described how he would place the pit between his index and middle fingers, then throw it away.My father said to him, "O Messenger of Allah, pray for us." So he said, "O Allah, bless them in what You have provided them, forgive them, and have mercy on them."Sahih.(17614m) Its isnad is sahih, like the one before it.