Job 20:16

¹⁴ yet in his stomach his food sours into the venom of cobras within him.

¹⁵ He swallows wealth but vomits it out; God will force it from his stomach.

He will suck the poison of cobras; the fangs of a viper will kill him.

¹⁷ He will not enjoy the streams, the rivers flowing with honey and cream.

¹⁸ He must return the fruit of his labor without consuming it; he cannot enjoy the profits of his trading.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: He will suck the poison of cobras; the fangs of a viper will kill him.
KJV: He shall suck the poison of asps: the viper’s tongue shall slay him.
WEB: He will suck cobra venom. The viper’s tongue will kill him.
ASV: He shall suck the poison of asps: The viper`s tongue shall slay him.
DARBY: He shall suck the poison of asps; the viper's tongue shall kill him.
BLB: The poison of cobras he will suck, [and] the tongue of a viper will kill him.

Acts 28:3–6
Paul gathered a bundle of sticks, and as he laid them on the fire, a viper, driven out by the heat, fastened itself to his hand.
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Romans 3:13
“Their throats are open graves; their tongues practice deceit.” “The venom of vipers is on their lips.”
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Matthew 3:7
But when John saw many of the Pharisees and Sadducees coming to his place of baptism, he said to them, “You brood of vipers, who warned you to flee from the coming wrath?
Read in context
Isaiah 30:6
This is the burden against the beasts of the Negev: Through a land of hardship and distress, of lioness and lion, of viper and flying serpent, they carry their wealth on the backs of donkeys and their treasures on the humps of camels, to a people of no profit to them.
Read in context
Deuteronomy 32:24
They will be wasted from hunger and ravaged by pestilence and bitter plague; I will send the fangs of wild beasts against them, with the venom of vipers that slither in the dust.
Read in context