Reward of reciting Ash-hadu al Laa ilaaha illallaah

Imam Ja'far Sadiq (a.s.) says,

 "One who recites Ash-hadu al Laa ilaaha illallaahu Wah'dahu laa shareekalahu ilaahanw waahidan ahadas samadal lam yattakhidh s'aah'ibatanw wa laa waladaa, the Almighty Allah writes forty-five hundred thousand rewards for him and wipes out forty-five hundred thousand sins and increases forty-five hundred thousand positions for him. That person is as if he has completed reciting the Holy Quran twelve times in a day and Allah will build a house for him in Paradise."

Reward of reciting Laa ilaaha illallaah thirty times a day

Imam Muhammad Baqir (a.s.) narrates from his father (a.s.), who in turn narrates from his father (a.s.)

" A person who recites Laa ilaaha illallaahul h'aqqul mubeen thirty times a day will be given wealth, his poverty will vanish and he will knock at the door of Paradise."

Reference: Sawabul Aamaal (English - Printed by As-Serat Publications),  Pg 34