The Prophet (may Allah's peace and blessings be upon him) commanded that one should leave whatever words or deeds he has doubts about, whether they are prohibited or not, unlawful or lawful, and choose instead what is not doubtful—things whose goodness and lawfulness he is certain about, as such things bring tranquility and comfort to the heart, whereas whatever is doubtful sows anxiety and confusion in the heart.
- A Muslim should set up his affairs upon certainty and leave whatever is doubtful and should be insightful regarding his religion.
- The prohibition of falling into suspicious matters.
- If you are seeking tranquility and comfort, then abandon what is doubtful and leave it aside.
- Allah is Merciful to His slaves, as He has commanded them with what brings comfort to the soul and mind and has forbidden them from what causes anxiety and confusion.
سنن النسائي (8/ 327) (5711). سنن الترمذي (4/ 286) (2518). مسند أحمد (3/ 248) (1723). التحفة الربانية في شرح الأربعين حديثًا النووية، لإسماعيل الأنصاري (ص29). شرح الأربعين النووية، لابن عثيمين (ص153). فتح القوي المتين في شرح الأربعين وتتمة الخمسين للنووي وابن رجب (ص56).