Devout Christians: The Whole Truth of Biblical Creation, Part 1 of 7. : ThyBlackMan.com
Time and time again, Lucifer asked for an assignment, but Yehovah would say “no”, because Lucifer was not created for such a purpose. But time after time after every creation, with a considerable interval between them, Lucifer pleaded for an assignment until God finally relented. Since Heaven was running out of room, Yehovah would soon construct His last creation and promised Lucifer that he would be the overseer, and that the Earth would be his new home forever. Yet it appears that Lucifer secured other covenants between him and Yehovah as well.
Source: thyblackman.com