Salah Being Kitaaban Mawquta 4:103
Salah and its belongings come from Sunnah: the consensus perpetual practice of Muslims community right from the prophet, not from Quran. No arguments based on Quran to nullify or invalidate a sunnah or its part is actually does not qualify to be debated. The verse simply mentions the known practice that saying prayer at prescribed time limits. Now how they are actually performed is the subject of Sunnah, not of Quran.