Maliks Muwatta Book 9, Hadith Number 41.

Section : Permission to Pass in Front of Someone Praying.

Yahya related to me from Malik from Ibn Shihab from Ubaydullah ibn Abdullah ibn Utba ibn Masud that Abdullah ibn Abbas said, “I approached, riding on a donkey, while the Messenger of Allah, may Allah bless him and grant him peace, was leading the people in prayer at Mina, and I was, at that time, nearing puberty. I passed in front of part of the row, dismounted, sent the donkey off to graze, and then joined the row, and no one rebuked me for doing so.”