Ye that have escaped the sword, go away, stand not still: remember the LORD afar off, and let Jerusalem come into your mind. Ye that have escaped the sword - namely, of the Medes. So great will be the slaughter that even some of God's people shall be involved in it, as they had deserved.
Remember the Lord afar off - though ye are banished far off from where ye used formerly to worship God.
Let Jerusalem come into your mind - while in exile, remember your temple and city, so as to prefer them to all the rest of the world wherever ye may be (Psalms 137:5; Isaiah 62:6).