It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that on the day Sa'd bin Mu'adh (may Allah be pleased with him) was buried, the Prophet (peace and blessings be upon him) was sitting at his grave, and he (peace and blessings be upon him) said: "If anyone could have been saved from the trial of the grave, Sa'd bin Mu'adh would surely have been saved. He was indeed squeezed once, then the pressure on him was relaxed."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10781