Q- What is the source and authenticity of the story wherein Prophet Sulayman (peace be upon him) decided to feed all the creation of Allah Almighty, and one fish ate all the food he had prepared?
It is mentioned in Ḥayāt al-Ḥayawān and Nuzhat al-Majālis, as outlined below. However, both these books contain many unestablished narrations and therefore cannot be relied upon. One should therefore exercise caution when citing narrations found exclusively in such books.
However, the authenticity of this story is questionable as it is narrated without any chain of narrators. have not come across this story in the established books of ḥadīth and history, and the content suggests that it is unestablished
And Allah Ta’ala Knows best
4 fatwa links below
https://islamicportal.co.uk/the-story-of-the-fish-who-ate-all-the-food-prepared-by-prophet-sulayman/
https://hadithanswers.com/sulayman-alayhis-salam-feeding-the-entire-creation/
https://www.islamweb.net/en/fatwa/336904/story-about-prophet-sulaymaan-and-fish#:~:text=So%20Sulaymaan%20started%20gathering%20food,the%20same%20thing%20every%20day%3F
https://askimam.org/public/question_detail/32343