Sayyidah Rumaythah (may Allah be pleased with her) said: I heard the Messenger of Allah (peace and blessings be upon him) (and had I wished, I could have kissed the Seal of Prophethood between his shoulders because of how close I was to him) as he was saying: "For Sa'd bin Mu'adh (may Allah be pleased with him), on the day he died, the Throne of the Most Merciful shook."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21073