... Then sang Moses]. "Then": when Moses saw the miracle, he had the idea of singing a song; similar construction in Josh. x. 12, I Kings vii. 8. Moses said to himself that he would sing, and that is what he did. Moses and the children of Israel "spake, saying, I will sing unto the Lord." The future tense is to be explained in the same way as in Josh. x. 12 (Joshua, seeing the miracle, ... — Rashi • Maurice Liber
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