I saw the Messenger of Allah ﷺ eating cucumber with fresh dates.
حدثنا يعقوب بن حميد بن كاسب وإسمعيل بن موسى قالا حدثنا إبراهيم بن سعد عن أبيه
رأيت رسول الله ﷺ يأكل القثاء بالرطب
Bukhari narrated it in the Book of Foods, Chapter on Eating Cucumber with Fresh Dates, no. 5440, and Muslim in the Book of Drinks, Chapter on Eating Cucumber with Fresh Dates, no. 2043, from the hadith of Ibrahim bin Saad, through the same chain.