Jabir bin Abdullah reported,

We set out on the expedition known as the Army of the Leaves, with Abu Ubayda in command. We suffered severe hunger, then the sea cast up a dead fish the like of which had never been seen, called the ambergris fish. We ate from it for half a month. Abu Ubayda took one of its bones, and a rider passed beneath it.

Bukhari 5493

Sahih

حدثنا مسدد حدثنا يحيى عن ابن جريج قال أخبرني عمرو أنه سمع

جابرا رضي الله عنه يقول

غزونا جيش الخبط وأمر أبو عبيدة فجعنا جوعا شديدا فألقى البحر حوتا ميتا لم ير مثله يقال له العنبر فأكلنا منه نصف شهر فأخذ أبو عبيدة عظما من عظامه فمر الراكب تحته

البخاري 5493صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Slaughter and hunting
Chapter
Allah's saying, "Lawful to you is the game of the sea"
Numbering
Darussalam 5493
Bukhari 5493