G2191–ἔχιδνα–echidna

But when he saw a number of the Pharisees and Sadducees coming to his baptism, he said to them, Offspring of snakes, at whose word are you going in flight from the wrath to come?

ἐχιδνῶν, echidnōn “of vipers,”

You offspring of snakes, how are you, being evil, able to say good things? because out of the heart's store come the words of the mouth.

ἐχιδνῶν, echidnōn “of vipers,”

You snakes, offspring of snakes, how will you be kept from the punishment of hell?

ἐχιδνῶν, echidnōn “of vipers!”

So he said to the people who went out to him for baptism: You offspring of snakes, at whose word are you going in flight from the wrath to come?

ἐχιδνῶν, echidnōn “of vipers,”

But when Paul had got some sticks together and put them on the fire, a snake came out, because of the heat, and gave him a bite on the hand.

ἔχιδνα echidna “a viper”