So 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, O you man of God, there is death in the pot. And they could not eat of it.
Read Chapter 4
Ephrem The Syrian
This was the starving steward of the prophets who was forced by the lack of food to go through the fields in order to gather some herbs. And since he could not find the herbs he knew, he gathered those that he did not know and were not edible. And since it is written that he gathered wild colocynths, some say that he gathered colocynths, others those [herbs] that are called the source of bitterness: with their inside parts, physicians make an effective and purifying medicine. Others say that perhaps their name comes from the term used by farmers: squirting cucumbers, which have a very bitter taste and resemble a vine. In fact, the Scripture calls a vine that plant that the steward found and from which he gathered colocynths. - "On the Second Book of Kings 4.39"