Musnad Ahmad 1842

It was narrated that Ibn ‘Abbas said: I spent the night with my maternal aunt, Maimoonah bint al-Harith and the Messenger of Allah (ﷺ) was with her as it was her night. He got up to pray in the night, and I got up and stood on his left so that I could follow his prayer. He took hold of my braid or my head and put me on his right.”