And say ye. A liturgical direction suited to this special occasion. Not needed for subsequent general use in Psa_106:47. See notes. Compare: 1Ch_16:7 and 1Ch_16:15.
gather us . . . deliver us. David knew from Deu_4:27; Deu_28:64; and Deut 32, that the scattering of Israel had been foretold; and this prayer was based upon that revelation. So with Solomon. 1Ki_8:46-50.