20 As he approached the den, he called out anxiously, "Daniel, servant of the living God, has your God, whom you serve so loyally, saved you from the lions?" 21 "O king, live forever!" said Daniel. 22 "My God sent his angel, who closed the mouths of the lions so that they would not hurt me. I've been found innocent before God and also before you, O king. I've done nothing to harm you." 23 When the king heard these words, he was happy. He ordered Daniel taken up out of the den. When he was hauled up, there wasn't a scratch on him. He had trusted 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.