Muwatta Malik #917
Hajj
Yahya related to me from Malik from Nafj from Salim and
Ubaydullah, two sons of Abdullah ibn Umar, that their father Abdullah
ibn Umar used to send his family and children from Muzdalifa to Mina
ahead of him so that they could pray subh at Mina and throw the stones
before everyone (else) arrived.
About Muwatta Malik
This hadith is #917 from Muwatta Malik, in the Book of Hajj. Muwatta Malik contains 1,985 hadiths across 61 books.