"I heard the Messenger of Allah say: "That which is lawful is plain and that which is unlawful is plain, and between them are matters which are not as clear. I will strike a parable for you about that: indeed Allah, the Mighty and Sublime, has established a sanctuary, and the sanctuary of Allah is that which He has forbidden. Whoever approaches the sanctuary is bound to transgress upon it, Or he said: 'Whoever grazes around the sanctuary will soon transgress upon it, and whoever indulges in matters that are not clear, he will soon transgress beyond the limits,"" (Using translation from Nasāʾī 4453)
سَمِعْتُ رَسُولَ اللهِ ﷺ وَلَا وَاللهِ لَا أَسْمَعُ أَحَدًا بَعْدَهُ يَقُولُ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِنَّ الْحَلَالَ بَيِّنٌ وَإِنَّ الْحَرَامَ بَيِّنٌ وَإِنَّ بَيْنَ ذَلِكَ مُشْتَبِهَاتٍ وَرُبَّمَا قَالَ أُمُورًا مُشْتَبِهَةً وَسَأَضْرِبُ لَكُمْ فِي ذَلِكَ مَثَلًا إِنَّ اللهَ حَمَى حِمًى وَإِنَّ حِمَى اللهِ مَا حَرَّمَ وَإِنَّهُ مَنْ يَرْعَ حَوْلَ الْحِمَى يُوشِكْ أَنْ يُخَالِطَ الْحِمَى قَالَ وَرُبَّمَا قَالَ أَوْشَكَ أَنْ يَرْتَعَ وَإِنَّهُ مَنْ يُخَالِطِ الرِّيبَةَ يُوشِكْ أَنْ يَجْسُرَ قَالَ وَلَا أَدْرِي أَشَيْءٌ فِي هَذَا الْحَدِيثِ أَمْ شَيْءٌ قَالَهُ الشَّعْبِيُّ