The Messenger of Allah said: "People will come to you seeking knowledge. When you see them say to them, 'Welcome, welcome,' in obedience to the injunctions of the Messenger of Allah and instruct them in knowledge."(One of the narrators said) "I said to Al-Hakam: 'What is 'Iqnuhum?' He said: 'Instruct them.'"  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ سَيَأْتِيكُمْ أَقْوَامٌ يَطْلُبُونَ الْعِلْمَ فَإِذَا رَأَيْتُمُوهُمْ فَقُولُوا لَهُمْ مَرْحَبًا مَرْحَبًا بِوَصِيَّةِ رَسُولِ اللَّهِ ﷺ وَاقْنُوهُمْ قُلْتُ لِلْحَكَمِ مَا اقْنُوهُمْ قَالَ عَلِّمُوهُمْ  

"We entered upon Hasan to inquire after him until we filled the house. He tucked up his legs, the he (hasan) said: 'We entered upon Abu Hurairah to inquire after him until we filled the house. He (Abu Hurairah) tucked up his legs and said: "We entered upon the Messenger of Allah until we filled the house. He was lying on his side, but when he saw us he tucked up his legs then he said: 'After I am gone, there will come to you people seeking knowledge. Welcome them, greet them and teach them.'" (Maudu')A narrator said: By Allah! We came across some people who did not welcome us, greet us, nor teach us unil we used to go to them, then they treated us rudely.  

دَخَلْنَا عَلَى الْحَسَنِ نَعُودُهُ حَتَّى مَلأْنَا الْبَيْتَ فَقَبَضَ رِجْلَيْهِ ثُمَّ قَالَ دَخَلْنَا عَلَى أَبِي هُرَيْرَةَ نَعُودُهُ حَتَّى مَلأْنَا الْبَيْتَ فَقَبَضَ رِجْلَيْهِ ثُمَّ قَالَ دَخَلْنَا عَلَى رَسُولِ اللَّهِ ﷺ حَتَّى مَلأْنَا الْبَيْتَ وَهُوَ مُضْطَجِعٌ لِجَنْبِهِ فَلَمَّا رَآنَا قَبَضَ رِجْلَيْهِ ثُمَّ قَالَ إِنَّهُ سَيَأْتِيكُمْ أَقْوَامٌ مِنْ بَعْدِي يَطْلُبُونَ الْعِلْمَ فَرَحِّبُوا بِهِمْ وَحَيُّوهُمْ وَعَلِّمُوهُمْ قَالَ فَأَدْرَكْنَا وَاللَّهِ أَقْوَامًا مَا رَحَّبُوا بِنَا وَلاَ حَيَّوْنَا وَلاَ عَلَّمُونَا إِلاَّ بَعْدَ أَنْ كُنَّا نَذْهَبُ إِلَيْهِمْ فَيَجْفُونَا  

"When we came to Abu Sa'eed Al-Khudri, he would say: 'Welcome, in accordance with the injunction of the Messenger of Allah, for the Messenger of Allah said to us: "The people will follow you; they will come to you from all parts of the earth seeking to understand the religion. So when they come to you, take care of them."  

كُنَّا إِذَا أَتَيْنَا أَبَا سَعِيدٍ الْخُدْرِيَّ قَالَ مَرْحَبًا بِوَصِيَّةِ رَسُولِ اللَّهِ ﷺ إِنَّ رَسُولَ اللَّهِ ﷺ قَالَ لَنَا إِنَّ النَّاسَ لَكُمْ تَبَعٌ وَإِنَّهُمْ سَيَأْتُونَكُمْ مِنْ أَقْطَارِ الأَرْضِ يَتَفَقَّهُونَ فِي الدِّينِ فَإِذَا جَاءُوكُمْ فَاسْتَوْصُوا بِهِمْ خَيْرًا