Dua e Tawassul

Shaykh Tusi says, in his book Misbah, that imam Hassan bin Ali Al Askari wrote this dua'a for Abu Muhammad who requested him to teach him the proper way of reciting salawat. Allama Majlisi has mentioned this dua'a on the authority of Ibn babawayh who confidently says that there is no difficulty or problem that this dua'a does not solve.
The merciful Allah is beseeched in the name of and for the sake of the Holy prophet and his Ahl ul Bayt.
It is known as "quick-fulfillment-of-all-legitimate-desires" dua'a.