The morning cometh, &c. This may be the oracle of silence implied in the name "Dumah" (see above, and compare Psalms 94:17; Psalms 115:17).
if ye will inquire. Isaiah had no answer. He is silent, but intimates that they may inquire again.
Related Commentaries of Isaiah 21:12
Isaiah 21:12
12 The watchman said, The morning cometh, and also the night: if ye will enquire, enquire ye: return, come.