I've already said it: in EMV 172.7.
Gospel of Matthew 7, 7-11
Mt 7, 7-11 : "Ask, and it will be given you; seek, and you will find; knock, and it will be opened to you. For everyone who asks receives; he who seeks finds; to him who knocks, it will be opened. Or: Which of you will give his son a stone when he asks for bread? Or will he give him a snake when he asks for a fish? If you then, who are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him!
Gospel of Luke 11, 1-13
Lk 11, 1-13 : It happened that Jesus was praying in a certain place. When he had finished, one of his disciples asked him, "Lord, teach us to pray, as John the Baptist also taught his disciples."
He replied, "When you pray, say: Father, hallowed be your name, your kingdom come. Give us the bread we need for each day. Forgive us our sins, for we ourselves forgive all those who wrong us. And lead us not into temptation."
Jesus said to them again, "Imagine that one of you has a friend and goes to him in the middle of the night to ask, 'My friend, lend me three loaves of bread, for a friend of mine has arrived home from a trip, and I have nothing to offer him.'" And if, from inside, the other replies, "Don't come bothering me! The door is already closed; my children and I are in bed. I can't get up to give you anything." Well, I tell you, even if he doesn't get up to give out of friendship, he'll get up because of this friend's shamelessness, and he'll give him whatever he needs.
I say to you: Ask, and it will be given you; seek, and you will find; knock, and it will be opened to you. For everyone who asks receives; he who seeks finds; to him who knocks, it will be opened. What father among you, when his son asks for a fish, will give him a snake instead of a fish? Or will he give him a scorpion when he asks for an egg? If you then, who are evil, know how to give good things to your children, how much more will the Father in heaven give the Holy Spirit to those who ask him!"