Charles H. Spurgeon on Psalms 65:13

It may seem strange, that he should first tell us, that they shout for joy, and then add the feebler expression, that they sing; interposing, too, the insensitive particle, pa, aph, they shout for joy, YEA, they also sing. The verb, however, admits of being taken in the future tense, they shall sing; and this denotes a continuation of joy, that they would rejoice, not only one year, but through the endless succession of the seasons. I may add, what is well known, that in Hebrew the order of expression is frequently inverted in this way. John Calvin.