See in Reader
591 B
591 B
MEM
This is the name of the thirteenth letter of the Hebrew alphabet. In the Hebrew language, each line of verses 97-104 begins with this letter.
your commandments are always with me
Constantly thinking about God's commandments is spoken of as if the commandments were an object that the writer keeps with him always. (See: rc://en/ta/man/translate/figs-metaphor)