According to the two-source theory the sayings-gospel Q is the second source - besides the gospel of Mark - of the gospels of Matthew and Luke. A milestone in the scientific investigation of Q was the publication of the Critical Edition of Q in the year 2000 by the International Q Project. The Documenta Q volumes supplement the Critical Edition with the presentation and evaluation of the history of research on each section of Q. This volume treats the segment Q 11:9-13 (Matt 7:7-11 Luke 11:9-13) together with Luke 11:5-8 which follow on the Lord's Prayer and represent the first commentary in earliest Christianity on this central text. Q motivates readers to pray, shows a surprising confidence in the providence of God, and clarifies the concepts of God's fatherhood and of being child of God.