346. hadíth
وَ سُمِّيَ بَيْتُ اَللَّهِ اَلْحَرَامَ لِأَنَّهُ حُرِّمَ عَلَى اَلْمُشْرِكِينَ أَنْ يَدْخُلُوهُ.
The House of Allah (swt), the Sacred (Bayt Allah (swt) al-Haram), was so named because it was made forbidden (haram) for the polytheists to enter it.