Musnad Ahmad 26:763

Yazid and Abu al-Nadr narrated to us, they said: al-Mas'udi narrated to us, from al-Walid ibn al-'Izar, from Abu 'Amr al-Shaybani, from 'Abdullah ibn Mas'ud, who said: I asked the Messenger of Allah, may Allah bless him and grant him peace, and I said: "O Messenger of Allah, which deeds are best?" He said: "Prayer at its appointed time." I said: "Then what, O Messenger of Allah?" He said: "Kindness to parents." I said: "Then what, O Messenger of Allah?" He said: "Jihad in the way of Allah." He said: Then he remained silent, and had I asked the Messenger of Allah, may Allah bless him and grant him peace, for more, he would have added more for me.