Musannaf Ibn Abi Shayba 1:910

Sharik narrated to us, from Salim, who said: I said to Sa’id ibn Jubayr, "I have a wet dream in my garment." He said, "If you find it, wash it; otherwise, leave it be." I said, "Should I cast it aside and wear another garment?" He said, "And you—you have many garments!"