17.Al-Ḥasan ibn ʿAlī said, “I heard Abā al-Ḥasan (a) say, ‘[One of the things] that ʿĪsā (a) said to the disciples was, “Do not grieve over what you have missed of this world of yours, just as the people of this world do not grieve over what they have missed from their Hereafter when they acquire their worldly objectives.”’”