Esther 2:23 records the plot uncovered by Mordecai — this very entry is what the king hears in 6:1, creating narrative continuity.

In Esther 5:8, Esther invites the king and Haman to a second banquet; the sleepless night in 6:1 leads to Mordecai's honor before that banquet.

Esther 2:22 records Mordecai's report of the assassination plot — the very event found in the chronicles read to the king here.

Esther 10:2 summarizes that Mordecai's deeds are written in the chronicles — the same book the king reads here.

In Daniel 2:1, Nebuchadnezzar's sleeplessness from dreams leads to revelation — a strong parallel of royal insomnia prompting divine purposes.

Genesis 41:1 describes Pharaoh's dream — like Esther, a king's night experience leads to a pivotal revelation for God's people.

1 Kings 14:19 refers to the 'book of the chronicles of the kings of Israel' — the same kind of royal record read here.

In Daniel 6:18, Darius cannot sleep from anxiety for Daniel — another king's sleepless night, though with a different cause than Esther's.