2 Kings 4:39-40

39Then one went out into the field to gather mallow, and found a wild vine and gathered from it his lap full of wild gourds; and he came and sliced them into the pot of stew, because they did not know what they were.

40So they poured it out for the men to eat. But as they were eating the stew, they cried out and said, “You man of God, there is 1death in the pot!” And they were unable to eat.