Hosea 7:6

For they have made ready their heart like an oven whiles they lie in wait, that is, as men bring fuel for an oven, so they have brought their hearts into their cunning; their baker sleepeth all the night; in the morning it burneth as a flaming fire. The baker is the ringleader, who inspires passion, who starts the conspiracy; the night provides a time of rest, so that the passion of idolatry, which burns throughout, may break forth with new strength and fierceness after the interval. When the evil thoughts of their hearts have fully matured, when they find time and opportunity for the execution of their plans, then they carry them out with eagerness.