We were with Abu Hurairah when Hasan bin Ali came and greeted him. The people returned the greeting, and he passed on while Abu Hurairah was unaware. Someone said to him, "That was Hasan bin Ali offering you greetings." So he caught up with him and said, "And upon you, my master."Someone asked him, "You call him 'my master'?"He replied, "I bear witness that the Messenger of Allah ﷺ said, 'He is a master.'"
كنا مع أبي هريرة، فجاء الحسن بن علي فسلم عليه، فرد عليه القوم ومضى، وأبو هريرة لا يعلم، فقيل له: هذا حسن بن علي يسلم، فلحقه فقال: وعليك يا سيدي، فقيل له: تقول: يا سيدي؟ فقال: أشهد أن رسول الله ﷺ قال: إنه سيد.
No references are available.
Narrated by Nasai in Amal al-Yawm wal-Layla (250), Abu Yaala (6561), and Tabarani in al-Kabir (24/3), all through the route of Zayd bin Hubab, who said, Muhammad bin Salih Tammar Madani told us, Muslim bin Abu Maryam told us, from Saeed bin Abu Saeed Maqburi, and he related it.Its chain is hasan because of Muhammad bin Salih Tammar, for he is hasan al-hadith. As for his statement, "Abu Hurairah did not know," it means he was not aware of his greeting.