Sunan Ibn Majah, Book 9, Hadith 2093 (In-Book) ⓘ
It was narrated from Ibn 'Umar that: the Prophet, said: "What is Haram does not make what is Halal into what is Haram.”
حَدَّثَنَا يَحْيَى بْنُ مُعَلَّى بْنِ مَنْصُورٍ، حَدَّثَنَا إِسْحَاقُ بْنُ مُحَمَّدٍ الْفَرْوِيُّ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عُمَرَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " لاَ يُحَرِّمُ الْحَرَامُ الْحَلاَلَ " .
also referenced under: Hadith 2015 (Reference) & Volume 3, Book 9, Hadith 2015 (DarusSalam)