Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this statement of the Noble Prophet (peace and blessings be upon him): "Whoever is eating dates with people should not eat two dates together; if he intends to do so, he should seek their permission. If they permit him, then he may do so."
Hadith Referenceصحیح ابن حبان / كتاب الأطعمة / 5232
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - المصدر نفسه: ق نحوه.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح