We know the rule of Qasar prayer in Islam that for the travelers, prayer will be as half meaning instead of 4 rak'at there are 2 rak'at.
Another Narration
Another Narration
As we have seen in above interesting narration that ibn e Umar sometimes used to pray 4 Raka'at and sometimes 2 raka't. How we can trust the theory of our Sunni fellows that follow any companion you will be guided while the companions used to change the rules of Quran and Sunnah. We are also unable to understand the theory of Sunni fellows that the companions have right to do against Quran and Sunnah, it is their Ijtahad (astaghferullah). In true Islam, Nobody has right to perform anything against the proven order of Quran and Sunnah.
Please find the interesting narration that (mother) Aisha perform the something which Uthman and other people did.
Another Narration