20 And when he came to the den, he cried out with a lamenting voice to Daniel. The king spoke, saying to Daniel, "Daniel, servant of the living God, has your God, whom you serve continually, been able to deliver you from the lions?" 21 Then Daniel said to the king, "O king, live forever! 22 My God sent His angel and shut the lions' mouths, so that they have not hurt me, because I was found innocent before Him; and also, O king, I have done no wrong before you." 23 Then the king was exceedingly glad for him, and commanded that they should take Daniel up out of the den. So Daniel was taken up out of the den, and no injury whatever was found on him, because he believed in his God.
Matthew Henry's Commentary on Daniel 6:20-23
Commentary on Daniel 6:18-24
(Read Daniel 6:18-24)
The best way to have a good night, is to keep a good conscience. We are sure of what the king doubted, that the servants of the living God have a Master well able to protect them. See the power of God over the fiercest creatures, and believe his power to restrain the roaring lion that goeth about continually seeking to devour. Daniel was kept perfectly safe, because he believed in his God. Those who boldly and cheerfully trust in God to protect them in the way of duty, shall always find him a present help. Thus the righteous is delivered out of trouble, and the wicked cometh in his stead. The short triumph of the wicked will end in their ruin.