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It sometimes denotes the best of any production (Genesis 45:18; Numbers 18:12; Psalms 81:16). The fat of sacrifices was to be burned (Leviticus 3:9-11; 4:8; 7:3; 8:25; Numbers 18:17. Compare Exodus 29:13-22; Leviticus 3:3-5).
It is used figuratively for a dull, stupid state of mind (Psalms 17:10).