«فَرَمَى عَنْ قَوْسِ عَقِيدَتِنَا»
He shot from the very bow of our opinion.
Ramā means to shoot; qaws is a bow; ʿaqīda here indicates a firm opinion or conviction. No arrow is literally discharged. The idiom says the guest has voiced what the companions themselves were inclined to think.
An invisible agreement between minds becomes a vivid physical image of shared aim.