'Completing' in the Bible

She will continue in purification from her bleeding for 33 days. She must not touch any holy thing or go into the sanctuary until completing her days of purification.

I have glorified You on the earthby completing the work You gave Me to do.

Then as John was completing his life’s work, he said, ‘Who do you think I am? I am not the One. But look! Someone is coming after me, and I am not worthy to untie the sandals on His feet.’

Now I rejoice in my sufferings for you, and I am completing in my flesh what is lacking in Christ’s afflictions for His body, that is, the church.