Musannaf Ibn Abi Shayba 33:432

Abdullah bin Numayr narrated to us, from Yahya bin Sa'id, from Sa'id bin al-Musayyib, that Salman and Abdullah bin Salam met. One of them said to his companion, "If you meet your Lord, inform me what you encountered from Him, and if I meet Him before you, I will inform you." Then one of them passed away, and his companion met him in a dream. He said, "Rely [upon Allah] and rejoice, for I have never seen anything like reliance [upon Allah]." He said it three times.