Nehemiah 1:4

1:4 When I heard these things I sat down abruptly, crying and mourning for several days. I continued fasting and praying before the God of heaven.

Nehemiah 9:1

The People Acknowledge Their Sin before God

9:1 On the twenty-fourth day of this same month the Israelites assembled; they were fasting and wearing sackcloth, their heads covered with dust.