When they went out of Egypt, they broke out in song, as it is written: ‘then Moses and the children of Israel sang the song’ (Exodus 15:1); and when Israel went out of Jerusalem they broke out in tears, as it is written: ‘bitterly she weeps in the night, her cheek wet with tears.’ (Lamentations 1:2)
In the third year of his reign, he made a feast. There are those that say that territories rebelled and when he conquered them he made a feast. Some say that it was his birthday and he sent missives to all his subjects to come and celebrate with him.