John Wesley on Exodus 22:29

The first - born of thy sons shalt thou give unto me - And much more reason have we to give ourselves and all we have to God, who spared not his own Son, but delivered him up for us all. The first ripe of their corn they must not delay to offer; there is danger if we delay our duty, lest we wholly omit it; and by slipping the first opportunity in expectation of another, we suffer Satan to cheat us of all our time.