I didn't realize the phrase "The fear of the Lord, that is wisdom" is from Job 28:28. I'd thought the first appearance was much later in the Proverbs.

I remember it from Proverbs 1:7 "The fear of the Lord is the beginning of knowledge"

I'm curious if the phrase appears somewhere in the mosaic law as well.

I think the book of Job is a good place to consider the "fear of the Lord". God's power over creation is incredible! He makes plans without asking our permission and he puts us through trials without telling us why - except to say it is for our sanctification. He judges evil. All these themes are on repeat throughout the book of Job.