1 Samuel 8:17

He will take the tenth of your sheep
As well as of their seed and vineyards; and not the tithe of their flocks only, but of their herds also, which are here included, as Kimchi observes:

and ye shall be his servants:
made slaves of by him, even as the Canaanitish servants were, according to Abarbinel; though others interpret it more mildly of their being obliged to pay tribute and taxes, for the support of his government.