2 Kings 4:39-40

39Then one went out into the field to gather herbs, and found a wild vine, and gathered from it his lap full of wild colocynths, and came and shred them into the pot of pottage; for they did not know them.

40And they poured out for the men to eat. And it came to pass, as they were eating of the pottage, that they cried out and said, Man of 1God, there is death in the pot! And they could not eat [it].