Bismillah. Alhamdulillahi rabbil-'alamin. Was-Salatu was-Salam 'ala Ashraful Anbiya Sayyidina Muhammad wa 'ala 'Alihi Muhammad.
Does reciting dua Sana in the beginning of Salah invalidate Salah, according to Shiism?
Dua Sana, Sunnis recite after Takbeeratul Ehram:
Please, give the evidence from Shia sources, or Sunni sources!