They suck cobra’s poison; a viper’s tongue kills them.
He shall suck the poison of asps: The viper's tongue shall slay him.
He shall suck the poison of asps [which ill-gotten wealth contains]; the viper's tongue shall slay him.
He shall suck the poison of asps: The viper’s tongue shall slay him.
He will suck the head of snakes, and the tongue of the viper will kill him.