Acting In Accordance To The Rukhsah And The ‘azeemah
If the ‘Udhr (excuse) arises, which is the Sabab (cause) for the Rukhsah, it is permitted for the Mukallaf to act with whichever one he wishes. He can choose to act in accordance to the ‘Azeemah or in accordance to the Rukhsah. That is because the texts related to the Rukhas (special permissions) have indicated that. Allah (swt) said:
And when you travel throughout the land, there is no blame upon you for shortening the prayer (An-Nisaa’ 101).
The lifting of the ‘Junaah’ (blame) mentioned in the Aayah means Al-Ibaahah (permissibility). As such, the Musaafir who travels the distance of shortening is provided with the choice between the ‘Azeemah, which is to complete the Salaah with four Rak’aaat, and between taking the Rukhsah and shortening the Salaah by praying the prayers consisting of four Rak’aaat with two Rak’ah (i.e. Zhohr, Asr and ‘Ishaa).
Allah (swt) said:
So whoever among you is ill or on a journey [during them] - then an equal number of other days [are to be made up] (Al-Baqarah 184).
This also indicates Al-Ibaahah (permissibility) i.e. a choice between fasting and breaking the fast (or not fasting).