The ‘Law of First Mention’ is a theological term that basically means ‘WAIT, what was THAT?’ (While your finger tip retraces the prior reading) Or technically, taking notice of the importance of the first time a name, attribute, declaration or regulation takes place in scripture (not when you first notice it however.)
The first mention of ‘remember’ is in reference to Noah in Genesis chapters 8-9. AMAZING word picture, God tells Noah He will remember the covenant He is making with him and all living creatures, this in reference to – not destroying all life again with flooded water. He places the rainbow in the clouds as a reminder, NOT to man, but to Himself. “Whenever the rainbow appears in the clouds, I will remember the everlasting covenant between God and all living creatures of every kind on earth.” (v16) This doesn’t mean God is forgetful and needs a slew of colored string tied to His divine finger, it means when man acts up (and by golly we ACT UP!) His remembrance (in the Hebrew) means ‘When I remember, I act differently.’ What a merciful binding element!
Carrying the same theme, “I remember Your ancient laws, O LORD, and I find comfort in them.” (Psalm 119:52) The psalmist purposefully remembering, this is his way of properly marking a mental note, (which in the Hebrew) ‘indicates an inward act accompanied by appropriate outward action.’* The Psalmist is saying that in his remembrance of God’s word, it causes him to act differently. Scripture, what loving-comforting guideline.
Paul declares in Ephesians 6, “Take the helmet of salvation and the sword of the Spirit, which is the word of God.” (v17, emphasis mine) the picture continues …the Greek for ‘word’ is rhema, which quite literally is “Scripture which the Spirit brings to our remembrance for use in time of need, a prerequisite being the regular storing of the mind with Scripture.” [Vine’s Expository Dictionary of Old Testament and New Testament Words] It is up to us to ‘take’ God’s word, build up the inventory (if you will) let’s be honest, it would indeed be a true shame to be in a particular situation, Holy Spirit goes to our mindful inventory and finding the shelves bare, having nothing to pull and use.
Remembering; God’s way of bringing to the forefront; Covenant, God stuff, promises and the call to particular lifestyle.
In Him, DeDe (“Let us consider how we may spur one another on towards love & good deeds.” – Hebrews 10:24)
* Theological Wordbook of the Old Testament
For more on the Law of First Mention:[ https://www.gotquestions.org/law-of-first-mention.html%5D