Hadith.5149 - Commander of the Faithful (as) delivered a sermon to the people and said: "Indeed, Allah (swt), the Blessed and Exalted, has set boundaries, so do not transgress them. He (swt) has made obligations, so do not neglect them. And He (swt) has remained silent on certain matters - not out of forgetfulness - so do not burden yourselves with them. This is a mercy from Allah (swt) for you, so accept it." Then Imam Ali ibn Abi Talib (as) said: "What is lawful (halal) is clear, and what is unlawful (haram) is clear, and between them are doubtful matters. Whoever avoids what is doubtful regarding sin will be even more cautious in avoiding what is clearly sinful. The acts of disobedience are the sanctuary of Allah (swt), the Mighty and Majestic. Whoever grazes near it is likely to fall into it." [BOOK=BOOK ON BLOOD MONEY (DIYYAT)] كِتَابُ الدِّيَاتِ‌

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.