'Keep' in the Bible

And he said to him, 'Why me dost thou call good? no one is good except One -- God; but if thou dost will to enter into the life, keep the commands.'

The young man saith to him, 'All these did I keep from my youth; what yet do I lack?'

and he said, 'Go away to the city, unto such a one, and say to him, The Teacher saith, My time is nigh; near thee I keep the passover, with my disciples;'

and if this be heard by the governor, we will persuade him, and you keep free from anxiety.'