The Bible verse "Our Father who art in heaven" is the opening line of the Lord's Prayer, taught by Jesus to His disciples as a model for how to pray. This prayer appears in the Gospel of Matthew, chapter 6, verses 9-13, and also in a slightly shorter form in Luke 11:2-4. Here is the full traditional version from Matthew 6:9-13 (King James Version):

"Our Father which art in heaven, Hallowed be thy name.
Thy kingdom come.
Thy will be done in earth, as it is in heaven.
Give us this day our daily bread.
And forgive us our debts, as we forgive our debtors.
And lead us not into temptation, but deliver us from evil:
For thine is the kingdom, and the power, and the glory, for ever. Amen."

In this prayer, "Our Father who art in heaven" acknowledges God as a loving, heavenly Father. The prayer continues by honoring God's name, asking for His kingdom and will to be established on earth as in heaven, requesting daily provision, forgiveness, and protection from temptation and evil. Jesus gave this prayer as a simple, heartfelt way to communicate with God, emphasizing relationship and dependence rather than ritualistic formulas

. This prayer is central in Christian worship and devotion, often memorized and recited in various Christian traditions worldwide.