Sayyiduna Sa'd (may Allah be pleased with him), who was the freed slave of Sayyiduna Abu Bakr (may Allah be pleased with him), narrated: "I presented dates before the Prophet (peace and blessings be upon him), and the people began eating them (two dates at a time) together, so the Messenger of Allah (peace and blessings be upon him) said: 'Do not eat (two dates) together.'"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Amir (may Allah have mercy on him) except Abu Dawud (may Allah have mercy on him)."
Hadith Referenceالمعجم الأوسط / باب الميم / 8543
Hadith Takhrij«أخرجه الحاكم فى «المستدرك» برقم: 7224، وأحمد فى «مسنده» برقم: 1738، وأبو يعلى فى «مسنده» برقم: 1574، والطبراني فى «الكبير» برقم: 5498»