Titus of Bostra
Catena Aurea · Lukasevangelium 11
And it came to pass, that, as he was praying in a certain place, when he ceased, one of his disciples said unto him, Lord, teach us to pray, as John also taught his disciples. And he said unto them, When ye pray, say, Our Father which art in heaven, Hallowed be thy name. Thy kingdom come. Thy will be done, as in heaven, so in earth. Give us day by day our daily bread. And forgive us our sins; for we also forgive every one that is indebted to us. And lead us not into temptation; but deliver us from evil.
(in Matt.) The disciples having seen a new way of life, desire a new form of prayer, since there were several prayers to be found in the Old Testament. Hence it follows, When he ceased, one of his disciples said to him, Lord, teach us to pray, in order that we might not sin against God in asking for one thing instead of another, or by approaching God in prayer in a manner that we ought not.