דברי הימים ב יב:ח פירוש: רש״י

For they will be his slaves [i.e., slaves] of Shishak and the other nations, as is explained.

and they will know My service When they repent, no ruler of the kings of the nations will be over them, but when you abandon My Law, you will experience servitude to the kings of the lands, and you will serve them.