John Gill's Exposition of the Whole Bible
Proverbs 19:12
The king's wrath [is] as the roaring of a lion,.... Which is very terrible when hungry, and is after its prey, and has got it. Kings, especially tyrannical ones, are compared to lions; as Nebuchadnezzar by Jeremiah, Jeremiah 4:17; and Nero by the Apostle Paul, 2 Timothy 4:7; and the rage of such is very dreadful, as Ahasuerus's was to Haman. Jarchi interprets the king, of the holy blessed God. It may be applied to Jesus Christ, the Lion of the tribe of Judah; who is said to cry with a loud voice, as when a lion roareth; and whose wrath is terrible to wicked men, and even to the kings of the earth, Revelation 5:5;
but his favour [is] as dew upon the grass; which refreshes and revives it, and causes it to grow and flourish: and so the favour and good will of a king to his subjects delights them, and causes joy and cheerfulness in them; and such an effect has the love of God and Christ on the children of men, Hosea 14:6.