1 Kings 8:51

“ For they are your people, and your inheritance, which you brought forth out of Egypt, from the midst of the furnace of iron,”

Here the emphasis is not on the land as their inheritance (1 Kings 8:34; 1 Kings 8:36; 1 Kings 8:40) but on the people themselves as His inheritance (Exodus 34:9; Deuteronomy 32:9), the people whom He had brought forth from Egypt (Exodus 20:2; Exodus 32:11; Leviticus 25:42; Leviticus 25:55; Leviticus 26:45; Deuteronomy 9:12; Deuteronomy 9:26; compare 1 Kings 4:20), ‘from the midst of the furnace of iron' (Deuteronomy 4:20; Jeremiah 11:4).

“For they are your people and your inheritance.” YHWH had proved it by delivering them and declaring His great favour towards them, both in the covenant and in giving them the land. They were His chosen race, His holy nation, His treasured possession (Exodus 19:5).