writes in Shams-ul-Ma’ārif, on page 37 (of the translation),

‘Whoever recites bismillahirahma nirraheem 786 times daily (with Ṣalāt-‘Alan-Nabī once before and once after) for sevendays without fail,his every need will be 

 fulfilled; whether that need is regarding attainment of any goodness, or getting rid of any calamity, or for progressin his trading.’’ (Shams-ul-Ma’ārif – translation, p. 37)