Esther 6:1 has the king reading the chronicles—these records include Mordecai's report from 2:22, leading to his reward.

Esther 6:2 explicitly mentions Mordecai telling about Bigthana and Teresh's plot—the very event from 2:22.

Acts 23:12-22 mirrors this: a conspiracy against Paul is reported by his nephew—same pattern of loyalty and intervention.

Ecclesiastes 10:20 warns that secret words against the king will be revealed—similar to how the assassination plot in 2:22 was uncovered.