They add this, But if not, to show they did not presume to tie God to this deliverance absolutely, for God is arbitrary, and knows how to deliver, and sometimes to suffer his saints to glorify him by suffering. It was therefore all one to them, which way of the two God would honour himself, they were resolved to venture suffering rather than sinning, and leave the cause to God.
Related Commentaries of Daniel 3:18
Daniel 3:18
18 But if not, be it known unto thee, O king, that we will not serve thy gods, nor worship the golden image which thou hast set up.