By one who is fitter for the work than I am. Heb. Send by the hand of him whom thou wilt send, i.e. should send; for the future tense oft signifies what one should do. See Genesis 20:9, Genesis 34:7 Zechariah 1:6, Zechariah 2:7. Thou usest according to thy wisdom to choose fit instruments, and to use none but whom thou dost either find or make fit for their employment, which I am not. Others, Send by the hand of Messias, whom thou wilt certainly send, and canst not send at a fitter time, nor for better work. Moses and the prophets knew that Christ would come, but the particular time of his coming was unknown to them. See 1 Peter 1:11.
Related Commentaries of Exodus 4:13
Exodus 4:13
13 And he said, O my Lord, send, I pray thee, by the hand of him whom thou wilt send.