Musnad Ahmad 191:2

Waki’ narrated to us, he said: Al-A’mash narrated to us, from Salam Abu Sharhabil, he said: I heard Habbah and Sawa’, the two sons of Khalid, saying: We came to the Messenger of Allah, peace and blessings of Allah be upon him, while he was doing some work—or building a structure—so we helped him with it. When he finished, he prayed for us and said: "Do not despair of goodness as long as your heads are shaking (i.e., as long as you are alive). Indeed, a human being is born by his mother red, having no covering, then Allah gives to him and provides for him."