Bulugh al-Maram 1511 — The Comprehensive Book

An-Nu'man bin Bashir Narrated from:

I heard Allah‘s Messenger (ﷺ) saying, (Nu'man pointed with his two fingers to his ears) ‘Both lawful (Halal) and unlawful things (Haram) are evident but in between them there are doubtful things·and most people have no knowledge about them. So he, who saves himself from these doubtful things, saves his religion and his honor (i.e. keeps them blameless). And he who indulges in these doubtful things is like a shepherd who pastures (his animals) near the Hima (private pasture) of someone else and at any moment he is liable to get in it.(O people!) Beware! Every king has a Hima and the Hima of Allah on the earth is what He declared unlawful (Haram). Beware In the body there is a piece of flesh if it becomes sound and healthy, the whole body becomes sound and healthy but if it gets spoilt, the whole body gets spoilt and that is the heart.”Agreed upon.