It is narrated from Sayyiduna Jabir, may Allah be pleased with him, that when Sayyiduna Sa’d bin Mu’adh was buried, the Prophet, peace and blessings be upon him, recited tasbih for a long time and we also recited tasbih. Then he kept saying takbir and we also kept saying takbir. Someone asked: O Messenger of Allah! Why did you recite tasbih and takbir? He replied: The grave was constricting for this righteous servant, then Allah made it spacious for him.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 15029
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن