It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) sent the weak members of his household ahead from Muzdalifah, then said: "Do not stone the Jamrah until the sun has risen."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12069