The phrase "Our Father in heaven, hallowed be Your name," is the opening line of the Lord's Prayer, also known as the Our Father or Pater Noster in Catholic tradition. The prayer is recorded in the Gospels of Matthew and Luke.
In Matthew Chapter 6, Jesus teaches his disciples how to pray. He instructs them not to pray out in the open like the hypocrites, but to pray hidden and alone. He then gives the Lord's Prayer as an example of how the followers should pray.
Broken into seven petitions, the Lord's Prayer covers topics that concern both God and man. The first three petitions discuss God's glory and beg that his will be done on earth. The last four are requests for God's assistance in the dealings of men. The Lord's Prayer is the most quoted passage of the Bible and a uniting scripture between Christian denominations.