Many Muslim scholars or at least Imams of Jumu'ah prayer use to say this du'a (supplication):
O Allah, bless us in Rajab and Sha‘baan, and let us reach Ramadan
اللهم بارك لنا في رجب وشعبان وبلغنا رمضان
in Rajab and Sha'baan (the two months right before Ramadan). Is it a du'a made by the Prophet () himself of or by any of our Muslim authorities (Sahaba/Shi'a Imams etc.)?
I'd like to know if this du'a is authentic and what sources for that are available?