Jerusalem remembered in the days of her affliction and of her miseries all her pleasant things that she had in the days of old, when her people fell into the hand of the enemy, and none did help her: the adversaries saw her, and did mock at her sabbaths.
In the tough times, Jerusalem thought about the good times from long ago. This was when her people were taken by enemies and no one came to help. The opponents saw her and made fun of her special days.