John Gill Commentary Isaiah 41:5

"The isles have seen, and fear; the ends of the earth tremble; they draw near, and come." — Isaiah 41:5 (ASV)

The isles saw it, and feared Not the victory which Abraham got over the kings; nor Cyrus's expedition against Babylon, and other nations, and his deliverance of the Jews; but the progress of the Gospel, through the ministry of the Apostle Paul: the idolatrous inhabitants of the Gentile nations saw great multitudes embracing and professing the Gospel; they saw their idols neglected, and their temples abandoned; they feared what would be the consequence of all this, that their old religion their fathers retained, and they were brought up in, would be abolished; and especially a panic seized the priests on this account, whose livelihood depended upon it:

the ends of the earth were afraid ; for the sound of the Gospel by him, and other apostles, went into all the earth, and their words to the end of the world, (Romans 10:18) meaning the inhabitants that dwelt in the furthest parts of the earth, where ignorance and idolatry wholly reigned: they drew near, and came: not to God, nor to Abraham, or Cyrus; rather to their gods, to exert themselves in the defence of their religion; or, which is best, they got together to consult what was proper to be done on such an emergency.