(Verse 3,4) This is a plan, gather a council: place your shadow as if it were night in the middle of the day, hide those who are fleeing, and do not disclose the wanderers. My outcasts will dwell with you: Moab, be their hiding place from the face of the destroyer, for the dust is at an end, the wretched one is consumed, the one who trampled on the earth has ceased. Instead of 'wretched' in Hebrew, 'Sod' is read, which can also be understood as 'destroyer'. It speaks to Moab, so that it may find a plan for salvation, and to the gathered elders, so that it may gather a council of salvation. He said, 'Will I see, and be saved, and earn God's mercy? In the bright light, and the open flight of my people, you should be like night and shadow, accept those fleeing, and do not betray the wanderers.' And immediately he explains why he said this: 'My refugees will dwell with you. For Jerusalem has been devastated, and all of Judaea that borders on Moab, my people will migrate to you. Therefore, be their refuge, and do not fear the attack of the destroyer, for he will pass quickly like dust: and the one who trampled the entire land and subjected it under his feet will be wiped away by a blowing breeze.' Some interpret this place wrongly about the Antichrist, thinking that the Saints at that time will pass to the Arabs because of the proximity of the city of Jerusalem, and now they are being warned not to betray those who are fleeing to them.
[AD 420] Jerome on Isaiah 16:3-4