Wait on the LORD, and keep his way, and he shall exalt thee to inherit the land: when the wicked are cut off, thou shalt see it. Wait on the Lord, and keep his way - This is the true mode of waiting on God which the Scripture recommends; keeping God's way - using all his ordinances, and living in the spirit of obedience. He who waits thus is sure to have the farther blessings of which he is in pursuit. קוה kavah, to wait, implies the extension of a right line from one point to another. The first point is the human heart; the line is its intense desire; and the last point is God, to whom this heart extends this straight line of earnest desire to be filled with the fullness of the blessing of the Gospel of peace.
And he shall exalt thee to inherit the land - If ye keep his way, and be faithful to him in your exile, he will exalt you, lift you up from your present abject state, to inherit the land of your fathers. See before, Psalms 37:9, Psalms 37:11, etc.
When the wicked are cut off, thou shalt see it - They did see the destruction of the Babylonish king, Belshazzar, and his empire; and it was in consequence of that destruction that they were enlarged.