The Prophet ﷺ said, "The grave has a squeezing pressure, and if anyone were to be spared from it, Saad bin Muaz would have been spared."
حدثنا يحيى عن شعبة حدثنا سعد بن إبراهيم وابن جعفر حدثنا شعبة عن سعد بن إبراهيم عن نافع قال ابن جعفر عن إنسان
عن النبي ﷺ قال إن للقبر ضغطة ولو كان أحد ناجيا منها نجا منها سعد بن معاذ
Its isnad is sahih via the route through Shubah, and daif via the route through Muhammad bin Jafar, due to the unknown status of the narrator from Ayesha. The hadith was narrated by Tabarani, 12/232, and Haythami said, 3/46, "The men of Ahmad's narration are the men of the Sahih."