'Keep' in the Bible

Behold, upon the mountains the feet of him that bringeth good tidings, that publisheth peace! Keep thy feasts, O Judah, perform thy vows; for the wicked one shall no more pass through thee; he is utterly cut off.

He that dasheth in pieces is come up against thee: keep the fortress, watch the way, make thy loins strong, fortify thy power mightily.