'Completing' in the Bible

" 'And if a man sells {a residential house in a walled city}, then it shall be his redemption until completing {a year after his selling}; its redemption {shall last} {a year}.

I have glorified you on earth [by] completing the work that you have given me {to do}.

But while John was completing [his] mission, he said, 'What do you suppose me to be? I am not [he]! But behold, one is coming after me of whom I am not worthy to untie the sandals of [his] feet!'