Prayer for Saturday 1 :
Sayyid Ibne Tawoos has related from Hazrat Imam Hasan al-Askari (a.s.) that he quoted his forefathers that one who prays four rakats prayer on Saturday and in each rakat he recites Surah Hamd, Surah Tawheed and Ayatul Kursi, the Almighty writes for him the grade of the prophets, the martyrs and the righteous. That is he shall be with them in Paradise and they shall be his best friends. - Baqiyatus slaehat english version page 91
Prayer for Saturday 2 :
The Messenger of Allah (s.a.w.a.) said: One who recites four rakat prayers on Saturday and in each rakat after Surah Hamd, recites Surah Kafiroon thrice and after the prayer recites Ayatul Kursi, once, then in exchange for each letter the Almighty rewards him with the reward of a martyr.
Prayer for Saturday eve 1 ( Night preceeding Sunday) 3:
The Messenger of Allah (s.a.w.a.) said: One who recites four rakat prayers on Saturday eve and in each rakat after Surah Hamd, recites Surah Tawheed seven times, each rakat of this prayer has the reward of 700 Hasana and the Almighty shall give him a city in Paradise.