[12].Surah Yusuf [Joseph]: Ayat 81-82

Ayat 81. "Return to your father and say, 'O our father! Verily, your son (Benjamin) has stolen, and we testify not except according to what we know, and we could not know the unseen!

Ayat 82. "And ask (the people of) the town where we have been, and the caravan in which we returned, and indeed we are telling the truth."  

Hazrat Hasan bin `Ali (May Allah be pleased with them) said: I remember (these words) from Messenger of Allah  [SAWW](PBUH): "Give up what is doubtful to you for that which is not doubtful; for truth is peace of mind and falsehood is doubt".

[At-Tirmidhi Hadith # 2518]. 

Lesson : as mentioned above in Surah Yusuf Ayat 82. "and indeed we are telling the truth." This Hadith leads us to the conclusion that one must always avoid doubtful things so that he does not do anything unlawful. This message is repeated in another Hadith which says that he who has saved himself from doubts has in fact saved his Faith and honour.