٧ - حدثنا محمد بن الحسن بن أحمد بن الوليد رحمه الله، قال: حدثنا محمد بن الحسن الصفار، قال: حدثنا محمد بن الحسين بن أبي الخطاب، عن علي بن أسباط، قال: سألت أبا الحسن الرضا عليه السلام عن الاستطاعة، فقال: يستطيع العبد بعد أربع خصال: أن يكون مخلى السرب، صحيح الجسم، سليم الجوارح، له سبب وارد من الله عز وجل، قال: قلت: جعلت فداك فسرها لي، قال: أن يكون العبد مخلى السرب، صحيح الجسم، سليم الجوارح، يريد أن يزني فلا يجد امرأة ثم يجدها، فإما أن يعصم فيمتنع كما امتنع يوسف، أو يخلى بينه وبين إرادته فيزني فيسمى زانيا  ولم يطع الله بإكراه ولم يعص بغلبة .
7. Muhammad ibn al-Hasan ibn Ahmad ibn al-Walid  said: Muhammad ibn al-Hasan alSaffar said: Muhammad ibn al-Husayn ibn Abu al-Khattab said, on the authority of `Ali ibn Asbat that Abu al-Hasan al-Rida  was asked about the issue of ability. He replied, “A servant is capable when he possesses four characteristics: his route is free from trouble, his body is healthy, he has all his limbs, and has a means of sustenance provided to him by Allah, the Mighty and High.” I asked, “May I be your ransom! Explain these reasons for me.” He explained, In order to be capable, a servant needs to have a route free from trouble. He needs to have a healthy body. And he needs to have all his limbs. He may intend to fornicate, but at first he does not find a woman then he finds one. Then, either he would be protected by Allah and he would stop from it as Yusuf  did; or Allah would abandon him between him and his intentions. Thus, he would fornicate and would be labeled a fornicator. He has not obeyed Allah from compulsion, and did not disobey because he was coerced.