Merry — That is, refreshing themselves with the provisions set before them. Sons of belial — Children of the devil, wicked and licentious men.
Related Commentaries of Judges 19:22
Judges 19:22
22 Now as they were making their hearts merry, behold, the men of the city, certain sons of Belial, beset the house round about, and beat at the door, and spake to the master of the house, the old man, saying, Bring forth the man that came into thine house, that we may know him.