Deut. 16:3
Thou shalt eat no leavened bread with it; seven days shalt thou eat unleavened bread therewith, even the bread of affliction; for thou camest forth out of the land of Egypt in haste: that thou mayest remember the day when thou camest forth out of the land of Egypt all the days of thy life.
1 Kings 22:27
And say, Thus saith the king, Put this fellow in the prison, and feed him with bread of affliction and with water of affliction, until I come in peace.
2 Chron. 18:26
And say, Thus saith the king, Put this fellow in the prison, and feed him with bread of affliction and with water of affliction, until I return in peace.
Isaiah 30:20
And though the Lord give you the bread of adversity, and the water of affliction, yet shall not thy teachers be removed into a corner any more, but thine eyes shall see thy teachers: