Abdul-Rahman bin Abu Bakr reported,
The Messenger of Allah ﷺ asked, "Is there any among you who has fed a poor person today?"Abu Bakr 
replied, "I entered the mosque and found a beggar asking for help. I noticed a piece of bread in the hand of Abdul-Rahman, so I took it from him and gave it to the beggar."
Abu Dawud 1670
Daifحدثنا بشر بن آدم حدثنا عبد الله بن بكر السهمي حدثنا مبارك بن فضالة عن ثابت البناني عن عبد الرحمن بن أبي ليلى
عن عبد الرحمن بن أبي بكر قال
قال رسول الله ﷺ هل منكم أحد أطعم اليوم مسكينا فقال أبو بكر رضي الله عنه دخلت المسجد فإذا أنا بسائل يسأل فوجدت كسرة خبز في يد عبد الرحمن فأخذتها منه فدفعتها إليه
No references are available.
[Its isnad is daif] Hakim narrated it in 1/412 from the hadith of Abdullah bin Bakr, through this route, and he graded it sahih according to the criteria of Muslim, and Dhahabi agreed with him.Mubarak bin Fadala conceals his sources in transmission and narrated this using the ambiguous wording "from" (an). Part of the hadith has a corroborating narration in Muslim, no. 1028, after no. 2387.