ما الدليل من القرآن والسنة على زيادة الإيمان بالطاعة ونقصانه بالمعصية؟

Faith increases with obedience and decreases with disobedience. Among the proofs from the Quran for this are His (the Exalted) sayings: {that they might add faith to their faith}, and His saying: {As for those who believed, it increased them in faith}, and His saying: {and it increased them in nothing but faith and submission}. And among the proofs from the Sunnah are the sayings of the Prophet (peace and blessings be upon him): “The adulterer does not commit adultery while he is a believer, nor does the thief steal while he is a believer, nor does the drinker drink wine while he is a believer.” And his saying: “If you were to remain in the state you are in when you are with me, and in remembrance, the angels would shake hands with you in your beds and in your paths. But O Handhala, there is a time for this and a time for that.”