Albert Barnes Commentary Psalms 147:14

"He maketh peace in thy borders; He filleth thee with the finest of the wheat." — Psalms 147:14 (ASV)

He makes peace in your borders – Margin, He makes your border peace. The word "border" here refers to a boundary and stands for all the domain or territory included within the boundaries of a country. The idea is that peace prevailed throughout the land.

And fills you with the finest of the wheat – Margin, as in Hebrew, fat of wheat. Literally, He satisfies you with the fat of wheat. There is no lack of wheat, and that of the best kind. Compare the notes at Psalm 132:15: I will satisfy her poor with bread.