Amr bin Shu'ayb (may Allah have mercy on him) narrates from his father, from his grandfather, that the Messenger of Allah (peace and blessings be upon him) forbade a man to sit between two men without their permission.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Hammad bin Zayd (may Allah have mercy on him) except Ahmad bin Abdah."
Hadith Referenceالمعجم الأوسط / باب السين / 3652
Hadith Takhrij«أخرجه أبو داود فى «سننه» برقم: 4844، والبيهقي فى «السنن الكبرى» برقم: 5974»