NET
6 They approach him, all the while plotting against him. Their hearts are like an oven; their anger smolders all night long, but in the morning it bursts into a flaming fire.
Darby
6 For they have applied their heart like an oven to their lying in wait: their baker sleepeth all the night; in the morning it burneth like a flaming fire.
KJV
6 For they have made ready their heart like an oven, whiles they lie in wait: their baker sleepeth all the night; in the morning it burneth as a flaming fire.