Musnad Ahmad 555:3

Abu al-Mughirah narrated to us, Hariz narrated to us, he said: Abd al-Rahman ibn Maysarah narrated to me, from Jubayr ibn Nufayr, from Busr ibn Jahhash al-Qurashi, that the Messenger of Allah (peace and blessings of Allah be upon him) spat one day into his palm and placed his finger upon it. Then he said: "Allah says: 'O son of Adam, how can you weaken Me when I created you from the likes of this? Until when I fashioned you and proportioned you, you walked between two garments, and the earth felt the thud of your footsteps. You gathered and withheld, until when [your soul] reached the collarbones, you said: "I will give charity," and when is the time for charity?'"