'Keeper' in the Bible

I, Jehovah, am its keeper, every moment I water it, Lest any lay a charge against it, Night and day I keep it!

And sons of the stranger, who are joined to Jehovah, To serve Him, and to love the name of Jehovah, To be to Him for servants, Every keeper of the sabbath from polluting it, And those keeping hold on My covenant.