Luke 1:72-73

to perform mercy towards our fathers, and to remember his own holy covenant:

Hebrews 6:16-18

For men indeed swear by something greater than themselves; and an oath for confirmation is with them conclusive in all disputes.

Hebrews 7:26

For such an high-priest was suitable to us, holy, inoffensive, spotless, separate from sinners, and made higher than the heavens:

Hebrews 10:21

and having a great priest over the house of God,

Hebrews 13:15

By him therefore let us offer a sacrifice of praise perpetually to God, that is the fruit of our lips confessing his name.

1 Peter 2:5

ye also, as living stones, are built up, a spiritual house, a holy priesthood, to offer spiritual sacrifices, well pleasing to God through Jesus Christ.

Treasury of Scripture Knowledge

Summary

And thou shalt go unto the priest that shall be in those days, and say unto him, I profess this day unto the LORD thy God, that I am come unto the country which the LORD sware unto our fathers for to give us.

Bible References

The priest

Hebrews 7:26
For such an high-priest was suitable to us, holy, inoffensive, spotless, separate from sinners, and made higher than the heavens:
Hebrews 10:21
and having a great priest over the house of God,
Hebrews 13:15
By him therefore let us offer a sacrifice of praise perpetually to God, that is the fruit of our lips confessing his name.
1 Peter 2:5
ye also, as living stones, are built up, a spiritual house, a holy priesthood, to offer spiritual sacrifices, well pleasing to God through Jesus Christ.

Which the

Luke 1:72
to perform mercy towards our fathers, and to remember his own holy covenant:
Hebrews 6:16
For men indeed swear by something greater than themselves; and an oath for confirmation is with them conclusive in all disputes.