Man has three friends on whose company he relies. First, wealth — which goes with him only while good fortune lasts. Second, his relatives — they go only as far as the grave and leave him there. The third friend, his good deeds, go with him beyond the grave.

The Talmud (AD 200–500) Collection of Jewish rabbinical writings

(Attributed)

I could not find an actual citation for this quotation, but the story (the explanation of a parable, in which a man is summoned before a king, and while his dearest friend will not go with him, and his second best friend will only go to the palace gates, his least-loved friend goes with him before the throne) shows up with different translation in multiple sources:

• The Talmud: Selections, Part 5 "Civil and Criminal Laws -- the Holy Days" - "The Day of Atonement" [tr. Polano (1876)].
• Isaac Aboav, Lamp of Light [Menorat Hamoar] [14th C], Fifth Lamp "Teshuvah," Sec. 2 [ch. 3]  in Leonard Kravitz and Kerry Olitzky, <i>Journey of the Soul: Traditional Sources on the</i> Teshuvah (1995).
• Talmudic and Other Legends [tr., comp. Weiss (1888 ed.), "Man's Three Friends" (Pirke R. Eliezer).