40. The most obligatory knowledge for you [to acquire] is that which you are responsible for acting upon.
40. The most obligatory knowledge for you [to acquire] is that which you are responsible for acting upon.
40 أوْلَى العِلْمِ بِكَ ما لا يُتَقَبَّلُ العَمَلُ إلاّ بِهِ.