George Leo Haydock

He prayed the third time, to teach us perseverance in our prayers. Of these particulars Christ might inform his disciples afterwards; or they were revealed to them. (Witham) — Our Lord prayed three different times, to obtain of his heavenly Father pardon for our past sins, defence against our present evils, and security against our future misfortunes; and that we might learn to address ourselves in prayer to the Father, Son, and Holy Ghost. (Rabanus)