Hakim al-Ummah Mawlana Ashraf ‘Ali Thanawi (may Allah shower His mercy upon him) related: 

‘‘Mawlana Rashid Ahmad Gangohi (may Allah shower His mercy upon him) once wrote a fatwa concerning a particular issue. Mawlana Muhammad Qasim Nanautwi’s (may Allah shower His mercy upon him) renowned disciple, Amir Shah Khan, sent a letter to Mawlana by post, in which he expressed an objection to this fatwa. Thereafter, feeling he had disrespected the Mawlana, he wrote a second letter, seeking forgiveness. Mawlana Gangohi wrote in reply, ‘I liked your first letter in which you had expressed an objection. I do not like this second letter, as whatever you had written in your first one was sincerely for the din. I am certain that you had no intention to be disrespectful and therefore I was not offended in the slightest.’ 

(A couplet of Mawlana Rumi is quoted here, the translation of which has been omitted). 

In contrast to this, on another occasion, someone who had obtained a fatwa from Mawlana [Rashid Ahmad Gangohi] expressed objections to him in an argumentative tone. In reply, Mawlana wrote, ‘we have answered according to our knowledge. If you do not approve, then refer to a scholar whom you trust. Above every man of knowledge, there is someone more knowledgeable.’’

Majalis-e-Hakim al-Ummat,  p. 102-103 (Karachi: Dar al-Isha‘at, Dhu ‘l-Qa‘dah, 1366 AH ed.) compiled by Mufti Muhammad Shafi‘ Usmani.