Then al-Naḍr—foremost among the scholars of Arabic—remarked: “ihtazza (‘shook’) means ‘rejoiced.’”

Al-Aʿmash narrated, from Abū Sufyān, from Jābir, in a report traced back to the Prophet: “The Throne of the All-Merciful shook at the death of Saʿd.” (1)

Yūsuf ibn al-Mājishūn related, from his father, from ʿĀṣim ibn ʿUmar ibn Qatādah, from his grandmother Rumaythah, who said:
“I heard the Prophet ﷺ say—and had I wished, because of my closeness to him, I could have kissed the seal between his shoulders—while he was declaring: ‘The Throne of the All-Merciful shook for him.’”
(That is, for Saʿd ibn Muʿādh.) (2)
Its chain is sound.

Al-Nasāʾī also transmitted, through the route of Muʿādh ibn Rifāʿah, from Jābir, who said:
“Gabriel came to the Messenger of Allah ﷺ and asked, ‘Who is this righteous servant who has died? The gates of heaven have been opened for him, and the Throne has moved for him.’
The Messenger of Allah ﷺ went out, and there lay Saʿd. He then sat by his grave….” The hadith continues. (3)

Ismāʿīl ibn Abī Khālid narrated, from Isḥāq ibn Rāshid, from Asmāʾ bint Yazīd, who said:
“When Saʿd ibn Muʿādh passed away, his mother cried out. The Prophet ﷺ said, ‘Will your tears not subside and your grief depart? For your son is the first of whom Allah smiled, and the Throne shook for him.’”