✦⋆· said,"You must adhere to conviction and keep away from doubt, for there is nothing more detrimental to a man's faith than for doubt to overpower his conviction."

● "Verily I am absolutely convinced about my Lord, and do not entertain any obscurity in my religion."

● "Doubt is the product of ignorance."

● "Whoever is insolent with regards to Allah's command becomes prone to doubting, and whoever doubts, Allah, Most Sublime over him, disgraces him with His authority, and belittles him with His Might just as he had shown contempt for His command."

● "Do not give in to misgivings lest you start to doubt, and do not doubt lest you disbelieve, and do not allow yourselves to become emboldened [against Allah] lest you fall into self-deception."

● "Doubt thwarts faith."

● "Doubt extinguishes the light of the heart."

● "The consequence of doubt is confusion."

● "A sincere person does not entertain misgivings and a person convinced [of his faith] does not doubt."

✦⋆· ) with regards to Allah's verse in the Qur'an: "Indeed Allah wants to repel all impurity from you..."[ Qur'an 33:33], said, 'Impurity is doubt, and by Allah, we never doubt in our Lord."