I heard the Messenger of Allah ﷺ say: What is lawful is clear and what is unlawful is clear, but between them are certain doubtful things. I give you an example for this. Allah has a preserve, and Allah's preserve is the things He has declared unlawful. He who pastures (his animals) round the preserve will soon fall into it. He who falls into doubtful things will soon be courageous.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ إِنَّ الْحَلاَلَ بَيِّنٌ وَإِنَّ الْحَرَامَ بَيِّنٌ وَبَيْنَهُمَا أُمُورٌ مُشْتَبِهَاتٌ وَأَحْيَانًا يَقُولُ مُشْتَبِهَةٌ وَسَأَضْرِبُ لَكُمْ فِي ذَلِكَ مَثَلاً إِنَّ اللَّهَ حَمَى حِمًى وَإِنَّ حِمَى اللَّهِ مَا حَرَّمَ وَإِنَّهُ مَنْ يَرْعَ حَوْلَ الْحِمَى يُوشِكْ أَنْ يُخَالِطَهُ وَإِنَّهُ مَنْ يُخَالِطِ الرِّيبَةَ يُوشِكْ أَنْ يَجْسُرَ  

I heard Messenger of Allah ﷺ say: But between them are certain doubtful things which many people do not recognize. He who guards against doubtful things keeps his religion and his honor blameless, but he who falls into doubtful things falls into what is unlawful.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ بِهَذَا الْحَدِيثِ قَالَ وَبَيْنَهُمَا مُشَبَّهَاتٌ لا يَعْلَمُهَا كَثِيرٌ مِنَ النَّاسِ فَمَنِ اتَّقَى الشُّبُهَاتِ اسْتَبْرَأَ عِرْضَهُ وَدِينَهُ وَمَنْ وَقَعَ فِي الشُّبُهَاتِ وَقَعَ فِي الْحَرَامِ  

The Prophet ﷺ said: A time is certainly coming to mankind when only the receiver of usury will remain, and if he does not receive it, some of its vapour will reach him. Ibn Isa said: Some of its dust will reach him.  

قَالَ النَّبِيُّ ﷺ ح وَحَدَّثَنَا وَهْبُ بْنُ بَقِيَّةَ أَخْبَرَنَا خَالِدٌ عَنْ دَاوُدَ يَعْنِي ابْنَ أَبِي هِنْدٍ وَهَذَا لَفْظُهُ عَنْ سَعِيدِ بْنِ أَبِي خَيْرَةَ عَنِ الْحَسَنِ عَنْ أَبِي هُرَيْرَةَ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لَيَأْتِيَنَّ عَلَى النَّاسِ زَمَانٌ لاَ يَبْقَى أَحَدٌ إِلاَّ أَكَلَ الرِّبَا فَإِنْ لَمْ يَأْكُلْهُ أَصَابَهُ مِنْ بُخَارِهِ قَالَ ابْنُ عِيسَى أَصَابَهُ مِنْ غُبَارِهِ  

We went out with the Messenger of Allah ﷺ to a funeral, and I saw the Messenger of Allah ﷺ at the grave giving this instruction to the grave-digger: Make it wide on the side of his feet, and make it wide on the side of his head. When he came back, he was received by a man who conveyed an invitation from a woman. So he came (to her), to it food was brought, and he put his hand (i.e. took a morsel in his hand); the people did the same and they ate. Our fathers noticed that the Messenger of Allah ﷺ was moving a morsel around his mouth. He then said: I find the flesh of a sheep which has been taken without its owner's permission. The woman sent a message to say: Messenger of Allah, I sent (someone) to an-Naqi' to have a sheep bought for me, but there was none; so I sent (a message) to my neighbour who had bought a sheep, asking him to send it to me for the price (he had paid), but he could not be found. I, therefore, sent (a message) to his wife and she sent it to me. The Messenger of Allah ﷺ said: Give this food to the prisoners.  

خَرَجْنَا مَعَ رَسُولِ اللَّهِ ﷺ فِي جَنَازَةٍ فَرَأَيْتُ رَسُولَ اللَّهِ ﷺ وَهُوَ عَلَى الْقَبْرِ يُوصِي الْحَافِرَ أَوْسِعْ مِنْ قِبَلِ رِجْلَيْهِ أَوْسِعْ مِنْ قِبَلِ رَأْسِهِ فَلَمَّا رَجَعَ اسْتَقْبَلَهُ دَاعِيَ امْرَأَةٍ فَجَاءَ وَجِيءَ بِالطَّعَامِ فَوَضَعَ يَدَهُ ثُمَّ وَضَعَ الْقَوْمُ فَأَكَلُوا فَنَظَرَ آبَاؤُنَا رَسُولَ اللَّهِ ﷺ يَلُوكُ لُقْمَةً فِي فَمِهِ ثُمَّ قَالَ أَجِدُ لَحْمَ شَاةٍ أُخِذَتْ بِغَيْرِ إِذْنِ أَهْلِهَا فَأَرْسَلَتِ الْمَرْأَةُ قَالَتْ يَا رَسُولَ اللَّهِ إِنِّي أَرْسَلْتُ إِلَى الْبَقِيعِ يَشْتَرِي لِي شَاةً فَلَمْ أَجِدْ فَأَرْسَلْتُ إِلَى جَارٍ لِي قَدِ اشْتَرَى شَاةً أَنْ أَرْسِلْ إِلَىَّ بِهَا بِثَمَنِهَا فَلَمْ يُوجَدْ فَأَرْسَلْتُ إِلَى امْرَأَتِهِ فَأَرْسَلَتْ إِلَىَّ بِهَا فَقَالَ رَسُولُ اللَّهِ ﷺ أَطْعِمِيهِ الأَسَارَى