وَلَا يَجُوزُ أَكْثَرُ مِنْ ذَلِكَ عِنْدَ أَبِي حَنِيفَةَ رَحِمَهُ اللَّهُ، وَقَالَ أَبُو يُوسُفَ وَمُحَمَّدٌ رَحِمَهُمَا اللَّهُ: يَجُوزُ إِذَا سَمَّى مُدَّةً مَعْلُومَةً
Translation: According to Abu Hanifah, an option exceeding three days is not permitted. Abu Yusuf and Muhammad allow it when a definite duration is specified.
The disagreement is not over the basic legitimacy of an option. It concerns its maximum duration.
Abu Hanifah: three days or less.
The two disciples: a longer option is valid if its duration is defined.
A fixed five-day option falls within the two disciples’ rule but exceeds Abu Hanifah’s limit.