Musnad Abu Ya'la al-Mawsili 110:222

Zuhayr narrated to us, Yahya ibn Abi Bukayr narrated to us, Shu'bah narrated to us, from al-Hakam, from Yahya ibn al-Jazzar, from Suhayb al-Basri, from Ibn Abbas: That the Prophet (peace and blessings of Allah be upon him) was praying, and two young girls from Quraysh came and took hold of his knees. I think he said: So he separated or parted them, and he prayed. And I came with a boy from Banu Hashim on a donkey, and we passed in front of him, then we entered into the prayer, and he did not turn away.