Give up what is doubtful
Hasan bin Ali (radi Allahu anhum) said, ‘I remember (these words) from the Messenger of Allah (sal Allahu alaihi wa sallam), “Give up what is doubtful to you for that which is not doubtful; for truth is peace of mind and falsehood is doubt”’
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.
And Allah Knows Best!