Narrated An Numan bin Bashir The Prophet [sallallaahu alayhi wa sallam] said "Both legal and illegal things are obvious, and in between them are (suspicious) doubtful matters. So whoever forsakes those doubtful things lest he may commit a sin, will definitely avoid what is clearly illegal; and whoever indulges in these (suspicious) doubtful things bravely, is likely to commit what is clearly illegal. Sins are Allah's Hima (i.e. private pasture) and whoever pastures (his sheep) near it, is likely to get in it at any moment."
On the authority of Al-Hasan bin Ali, the grandson of the messenger of Allah, who said : I memorized from the messenger of Allah his saying :
"Leave that which makes you doubt for that which does not make you doubt."
Stay away from doubt, since doubt is the most dishonest word, and do not spy and do not probe (into others affairs) and do not hate each other, and be brothers to each other