John Calvin Commentary Isaiah 61:5

"And strangers shall stand and feed your flocks, and foreigners shall be your plowmen and your vine-dressers." — Isaiah 61:5 (ASV)

And strangers shall stand. He means that foreigners and strangers shall be ready to yield obedience to them. For, because they were at that time separated from the rest of the nations, no one was willing to assist them, and therefore he says that strangers stand; that is, they are ready to meet and assist them. Regarding what follows, about “feeding sheep” and “cultivating fields and vines,” these are metaphorical expressions. For the Prophet deals with the kingdom of Christ, which is spiritual, but through these figures describes its perfect happiness, so that we may understand it better from examples drawn from those things which are known to us. Therefore, let us understand that we shall be truly happy when Christ shall exercise His dominion over us; for in this way we shall also obtain, beyond expectation, many advantages of which the children of Adam are justly deprived.