As for this al-Haytham, it says in al-Mizan: “It is not known who he is.”
I say: As for his shaykh, Abu al-Muqawwim, I could find no biographical notice for him. Al-Hakim then transmitted a corroborating report for it from the hadith of Abu Bakrah, but it includes Sulayman ibn Sa‘id al-Nushayti, who is weak. It also has another corroborating report from the hadith of Buraydah, cited in al-Mishkat (4804). “Wisdom,” meaning beneficial speech in poetry that restrains one from ignorance and foolishness and forbids them. Al-Nihayah.
1732 — “I am only a human being: the eye sheds tears, the heart is humbled, and we say nothing that displeases the Lord. By Allah, O Ibrahim, we are indeed grieved by your loss.”
Ibn Sa‘d recorded it in al-Tabaqat (1/142), from ‘Asim ibn ‘Umar ibn Qatadah, from Mahmud ibn Labid, who said: The sun eclipsed on the day that Ibrahim, the son of the Messenger of Allah, may Allah bless him and grant him peace, died ... His eyes filled with tears, and they said: “O Messenger of Allah, do you weep when you are the Messenger of Allah?” He said ... and then mentioned it.
I say: This is an authentic chain of transmission; all its narrators are trustworthy, and Mahmud ibn Labid was a young Companion. It has a corroborating report from the hadith of Shahr ibn Hawshab, from Asma’ bint Yazid, who said: When Ibrahim, the son of the Messenger of Allah, may Allah bless him and grant him peace, passed away, the Messenger of Allah, may Allah bless him and grant him peace, wept. The one offering condolences—Abu Bakr or ‘Umar—said to him: “You are more entitled than anyone to honor that whose right Allah has made weighty.” The Messenger of Allah, may Allah bless him and grant him peace, then said: “The eye sheds tears and the heart grieves, but we say nothing that displeases the Lord. Were it not for the fact that it is a true promise ...”