Musannaf Ibn Abi Shaybah 34493 — Reports on Sad bin Muadh

Ishaq bin Rashid (may Allah have mercy on him) said that an Ansari woman named Sayyidah Asma bint Yazid (may Allah be pleased with her) said: When the funeral of Sayyiduna Sa'd bin Mu'adh (may Allah be pleased with him) was brought out, his mother cried out. The Messenger of Allah (peace and blessings be upon him) said to his mother: "Why do your tears not dry, and why does your grief not end? Your son is the first person for whom Allah laughed, and even the Throne moved because of him."