Esther 4:1 records Mordecai's personal mourning with sackcloth and ashes, the immediate cause of the widespread mourning in verse 3.

Esther 1:1 establishes the 127 provinces, the same vast territory where the decree causes widespread mourning.

Esther 3:12 records the writing of Haman's decree, which directly results in the mourning described here.

Esther 9:31 refers to the fasts and lamentations established for Purim, which originated from the mourning in 4:3.

In Isaiah 22:12, God calls for weeping and sackcloth — the exact outward signs seen here when disaster looms.

In Isaiah 37:1-3, Hezekiah puts on sackcloth in the face of Assyria — the same response to a lethal decree.

In Daniel 9:3, Daniel uses fasting and sackcloth — the same practices of humble supplication in national crisis.

In Isaiah 58:5, God questions mere sackcloth and ashes — contrasting the heartfelt mourning of the Jews here.

Nehemiah 9:1 shows a similar scene of national fasting and sackcloth, paralleling the communal mourning of the Jews in Esther.