Malachi 3:16

¹⁶ Then they that feared the LORD spake often one to another: and the LORD hearkened, and heard it, and a book of remembrance was written before him for them that feared the LORD, and that thought upon his name.

Days of old

The days of old (Psalms 77:5) signify states of the most ancient church, years of ancient times, and states of the ancient church.