Bayhaqi 6805 — Those who claimed that the Prophet ﷺ prayed

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says that when Sayyiduna Hamzah (may Allah be pleased with him) was martyred in the Battle of Uhud, Sayyidah Safiyyah (may Allah be pleased with her) came looking for him, and she did not know what had happened to Sayyiduna Hamzah (may Allah be pleased with him). She met Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna al-Zubayr (may Allah be pleased with him), and Sayyiduna Ali (may Allah be pleased with him) said to Sayyiduna al-Zubayr (may Allah be pleased with him): Tell your mother. Sayyiduna al-Zubayr (may Allah be pleased with him) said: "No, rather you tell your paternal aunt." The narrator says: Sayyidah Safiyyah (may Allah be pleased with her) asked what had happened to Hamzah (may Allah be pleased with him), and the two of them made it appear as if they knew nothing. Then the Prophet (peace and blessings be upon him) came. He (peace and blessings be upon him) said: "I fear for her sanity (lest she lose her senses)." Then he (peace and blessings be upon him) placed his hand on her chest and supplicated for her. The narrator says: Then Sayyidah Safiyyah (may Allah be pleased with her) recited 'Inna lillahi wa inna ilayhi raji'un' (We belong to Allah and to Him we return) and wept. The narrator says: Then he (peace and blessings be upon him) came to him and stood there, and Sayyiduna Hamzah (may Allah be pleased with him) had been mutilated, so he (peace and blessings be upon him) said: "Were it not for (fear of) the women's distress, I would have left him in this state, until he is gathered from the bellies of the beasts and the crops of the birds." The narrator says: Then he (peace and blessings be upon him) gave orders concerning the slain and offered the funeral prayer: nine of the slain would be placed, and the tenth would be Sayyiduna Hamzah (may Allah be pleased with him); then he (peace and blessings be upon him) would say seven takbirs over them, and they would be lifted away while Sayyiduna Hamzah (may Allah be pleased with him) was left; then another nine would be brought, and over them too he (peace and blessings be upon him) would say seven takbirs, until he (peace and blessings be upon him) had finished with all of them.
I know it only from the hadith of Abu Bakr bin Ayyash from Yazid bin Abi Ziyad, and neither of them was a precise memoriser (hafiz).