Matthew 6:9

Οὕτως οὖν προσεύχεσθε ὑμεῖς· Πατερ ἡμῶν ὁ ἐν τοῖς οὐρανοῖς· ἁγιασθήτω τὸ ὄνομά σου.

This, then is how you should pray: “Our Father who is in Heaven, hallowed be your name.