“The Prophet (ﷺ) did not forbid (eating) mastigures, but he found that distasteful. It is the food of most shepherds, and Allah, the Mighty and Sublime, has benefited more than one person thereby. If I had some I would eat it.”

Another chain reports a similar hadith.
Sunan Ibn Majah Book 28, Hadith 40
← Previous Hadith “We were with the Prophet (ﷺ) and the people caught a mastigure. They grilled it and ate from it. Then I caught a mastigure so I grilled it and brought it to the Prophet (ﷺ). He took a palm stalk and started counting his finger with it, and said: ‘A nation from among the Children of Israel was turned into beasts of the earth, and I do not know if this is they.’ I said: ‘The people have grilled them and eaten them.’ He did not eat it and he did not forbid it.”

Sunan Ibn Majah Book 28, Hadith 39 Next Hadith → “A man from among Ahlus-Suffah called the Messenger of Allah (ﷺ) when he had finished the prayer, saying: ‘O Messenger of Allah! Our land is a land infested with mastigures. What do you think of (eating) mastigures?’ He said: ‘I have heard that a nation was transformed.’ He did not tell us to eat them, and he did not forbid that.”

Sunan Ibn Majah Book 28, Hadith 41