I saw the Prophet ﷺ eating cucumber with fresh dates.
حدثنا إبراهيم بن سعد حدثني أبي
رأيت النبي ﷺ يأكل القثاء بالرطب
Its isnad is sahih. Muslim narrated it, 2:142, from Yahya and Ibn Awn, from Ibrahim bin Saad. Bukhari, Abu Dawud, Tirmidhi, and Ibn Majah also narrated it, as in Dhakhair Mawarith, 2628.