Abu Umamah bin Sahl bin Hunayf said, concerning the verse in which Allah, the Mighty and Majestic, said: "And do not aim at the bad of it to spend (in charity)" [Surah al-Baqarah: 267]: "This refers to Ju'rur and Lawn Ibn al-Hubayq (kinds of dates); the Messenger of Allah (peace and blessings be upon him) forbade that they be taken in charity."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5548