And say ye.. liturgical direction suited to this special occasion. Not needed for subsequent general use in Psalms 106:47. See notes. Compare: 1 Chronicles 16:7 and 1 Chronicles 16:15.
gather us... deliver us. David knew from Deuteronomy 4:27; Deuteronomy 28:64. and Deuteronomy 32, that the scattering of Israel had been foretold; and this prayer was based upon that revelation. So with Solomon. 1 Kings 8:46-50.
holy. See note on Exodus 3:5.