David begins in verse 15 instructing the people to remember God’s covenant forever, and the history of protection and provision over their ancestors.
Thoughts
This glory I think is the honour in reputation of all that only God could do and did do for their ancestors and a thousand generations. Telling implies that you have to know it first. I think this use of tell is know it and declare it!
How would you ‘tell of His glory’ today? What would you say?