Be strong ... - David adopts the words of Moses to the Israelites (compare the marginal references) and to Joshua.
Related Commentaries of 1 Chronicles 22:13
1 Chronicles 22:13
13 Then shalt thou prosper, if thou takest heed to fulfil the statutes and judgments which the LORD charged Moses with concerning Israel: be strong, and of good courage; dread not, nor be dismayed.