Musnad Ahmad 788:51

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from Mansur, from Ibrahim, from Yazid ibn Aws, from Abu Musa, that he fainted, and the mother of his child wept over him. When he regained consciousness, he said to her: "Has the statement of the Messenger of Allah (may Allah bless him and grant him peace) not reached you?" He said: So she asked him, and he said: He said: "He is not of us who wails loudly, shaves (the hair), and tears (the garment)."