A pan hung from each end of the bar. The object being weighed was put in one pan and a weight in the other.
وَكَانَ فِي طَرَفَيِ ٱلذِّرَاعِ كَفَّتَانِ مُعَلَّقَتَانِ يُوضَعُ فِي ٱلْوَاحِدَةِ مَا يُرَادُ وَزْنُهُ وَفِي ٱلْأُخْرَى مِعْيَارٌ لِلْوَزْنِ .‏