Sahih Muslim 677 k
It has been reported on the authority of Anas b. Malik that some people came to the Messenger of Allah (ﷺ) and said to him:
Send with us some men who may teach us the Qur'an and the Sunnah. Accordingjy, he sent seventy men from the Ansar. They were called the Reciters and among them was my maternal uncle. Haram. They used to recite the Qur'an, discuss and ponder over its meaning at night. In the day they brought water and poured it (in pitchers) in the mosque, collected wood and sold it, and with the sale proceeds bought food for the people of the Suffa and the needy. The Prophet (ﷺ) sent the Reciters with these people, but these (treacherous people) fell upon them and killed thern before they reached their destination (While dying), they said: O Allah, convey from us the news to our Prophet that we have met Thee (in a way) that we are pleased with Thee and Thou art pleased with us. (The narrator said): A man attacked Haram (maternal uncle of Anas) ) from behind and smote him with a spear which pierced him. (While dying), Haram said: By the Lord of the Ka'ba, I have met with success. The Messenger of Allah (ﷺ) said to his Companions: Your brethren have been slain grid they were saying: O Allah, convey from us to our Prophet the news that we have met Thee in a way that we are pleased with Thee and Thou art pleased with us.
حَدَّثَنَا مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا عَفَّانُ، حَدَّثَنَا حَمَّادٌ، أَخْبَرَنَا ثَابِتٌ، عَنْ أَنَسِ بْنِ مَالِكٍ،
 قَالَ جَاءَ نَاسٌ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالُوا أَنِ ابْعَثْ مَعَنَا رِجَالاً يُعَلِّمُونَا الْقُرْآنَ
 وَالسُّنَّةَ ‏.‏ فَبَعَثَ إِلَيْهِمْ سَبْعِينَ رَجُلاً مِنَ الأَنْصَارِ يُقَالُ لَهُمُ الْقُرَّاءُ فِيهِمْ خَالِي حَرَامٌ يَقْرَءُونَ
 الْقُرْآنَ وَيَتَدَارَسُونَ بِاللَّيْلِ يَتَعَلَّمُونَ وَكَانُوا بِالنَّهَارِ يَجِيئُونَ بِالْمَاءِ فَيَضَعُونَهُ فِي الْمَسْجِدِ
 وَيَحْتَطِبُونَ فَيَبِيعُونَهُ وَيَشْتَرُونَ بِهِ الطَّعَامَ لأَهْلِ الصُّفَّةِ وَلِلْفُقَرَاءِ فَبَعَثَهُمُ النَّبِيُّ صلى الله
 عليه وسلم إِلَيْهِمْ فَعَرَضُوا لَهُمْ فَقَتَلُوهُمْ قَبْلَ أَنْ يَبْلُغُوا الْمَكَانَ ‏.‏ فَقَالُوا اللَّهُمَّ بَلِّغْ عَنَّا نَبِيَّنَا
 أَنَّا قَدْ لَقِينَاكَ فَرَضِينَا عَنْكَ وَرَضِيتَ عَنَّا - قَالَ - وَأَتَى رَجُلٌ حَرَامًا خَالَ أَنَسٍ مِنْ
 خَلْفِهِ فَطَعَنَهُ بِرُمْحٍ حَتَّى أَنْفَذَهُ ‏.‏ فَقَالَ حَرَامٌ فُزْتُ وَرَبِّ الْكَعْبَةِ فَقَالَ رَسُولُ اللَّهِ صلى الله
 عليه وسلم لأَصْحَابِهِ ‏
"‏ إِنَّ إِخْوَانَكُمْ قَدْ قُتِلُوا وَإِنَّهُمْ قَالُوا اللَّهُمَّ بَلِّغْ عَنَّا نَبِيَّنَا أَنَّا قَدْ لَقِينَاكَ
 فَرَضِينَا عَنْكَ وَرَضِيتَ عَنَّا ‏"‏ ‏.‏