'Completion' in the Bible

Then the next day, Paul took the men, having purified himself along with them, and entered the temple, announcing the completion of the purification days when the offering for each of them would be made.

But now finish the task as well, that just as there was eagerness to desire it, so there may also be a completion from what you have.

When the time came to completion, God sent His Son, born of a woman, born under the law,

I am sure of this, that He who started a good work in you will carry it on to completion until the day of Christ Jesus.