1 Chronicles 22:13 -

The references to olden time, and the pointed reference to Moses, must be regarded as emphatic. In 1 Chronicles 28:20 we find the additional words, "and do it," inserted after the animated and intensely earnest exhortation, Be strong, and of good courage . This inspiriting summons was no new one. It was probably already hallowed in the name of religious language, and would be often quoted ( Deuteronomy 4:1 ; Deuteronomy 31:5-8 ; Joshua 1:5-9 ).