Praise be to Allah,
Sufyaan [ibn ‘Uyaynah] narrated to us from ‘Abdullaah ibn Abu Bakr from Anas ibn Maalik said that the Messenger of Allah (PBUH) said,
“Three things follow a dead person [to his grave]: his relatives, his property, and his deeds. Two of them return and one remains [with him]: his relatives and property return, but his deeds remain [with him].”
(Musnad Aflmad, Vol. 3, p. 110. The isnaad of this hadeeth is Saheeh according to the conditions set by al-Bukhaaree and Muslim.)
Source:
Thulaathiyyaat Musnad Ahmad ibn Hanbal (may Allah have mercy on him)
Reports of Imaam Ahmad that have only three narrators between him and the Prophet, peace, and blessings be upon him.
Shaykh Muhammad ibn Ahmad ibn Saalim as–Saffaareenee al–Hanbalee ~(1114 –1188 AH)