1 Kings 1:21 - Ellicott's Commentary On The Whole Bible

Shall sleep with his fathers. — Here this phrase, so constantly used in the record of the death of the kings, occurs in these books for the first time. (It is also found in the message of promise by Nathan. 2 Samuel 7:12, relating to the succession of the son who should build the Temple.) We find corresponding expressions in Genesis 15:15; Deuteronomy 31:16. Without connecting with the use of this phrase anything like the fulness of meaning which in the New Testament attaches to “the sleep” of the departed servants of God (as known to be a “sleep in Jesus”), it seems not unreasonable to recognise in it, at least, a rudimentary belief in death as rest and not extinction. The addition, “with his fathers,” has probably a reference to “the tombs of the kings;” especially as we find that it is not adopted in the cases of Jehoram (2 Chronicles 21:20) and Joash. (2 Chronicles 24:25), who were not buried therein.