Sunan Ibn Majah 4165

It was narrated that Habbah and Sawa’, the two daughters of Khalid, said:“We entered upon the Prophet (ﷺ) when he was doing something, so we helped him with it. Then he said: ‘Do not despair of provision so long as your heads are still moving, for a person’s mother bears him red with raw skin, then Allah provides for him.’”