Therefore will I number you; or, apportion you (maaithi)—a play upon the name of M'ni. The sword … slaughter. Not, perhaps, intended literally. Wicked men are God's sword (Psalms 17:13), and deliverance into their hand would be deliverance to the sword and slaughter.
The exiles suffered grievously at the hands of their Babylonian masters (Isaiah 47:6; Isaiah 49:17, etc.). The character of their sufferings is given in the ensuing verses (Isaiah 65:13, Isaiah 65:14).
When I called, ye did not answer (see 2 Chronicles 36:15, 2 Chronicles 36:16; Proverbs 1:20-25; Isaiah 66:4).