עַל־מָ֤ה ׀ אֶשָּׂ֣א בְשָׂרִ֣י בְשִׁנָּ֑י וְ֝נַפְשִׁ֗י אָשִׂ֥ים בְּכַפִּֽי׃
Wherefore? I will take my flesh in my teeth, And put my life in my hand.
Rashi on Job
my flesh up into my teeth to afflict myself and force myself to silence?
Malbim on Job
Unlike his companions, Job has nothing to fear from saying what he really believes; his suffering can get no worse.
Rashi on Job
and take my life into my hand to bring my life close to death with the agonies of silence.