What is said regarding the hand to hand exchange (of books of knowledge), and the writing of knowledge by religious scholars to different countries

وَقَالَ أَنَسٌ نَسَخَ عُثْمَانُ الْمَصَاحِفَ، فَبَعَثَ بِهَا إِلَى الآفَاقِ. وَرَأَى عَبْدُ اللَّهِ بْنُ عُمَرَ وَيَحْيَى بْنُ سَعِيدٍ وَمَالِكٌ ذَلِكَ جَائِزًا. وَاحْتَجَّ بَعْضُ أَهْلِ الْحِجَازِ فِي الْمُنَاوَلَةِ بِحَدِيثِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ حَيْثُ كَتَبَ لأَمِيرِ السَّرِيَّةِ كِتَابًا وَقَالَ: «لاَ تَقْرَأْهُ حَتَّى تَبْلُغَ مَكَانَ كَذَا وَكَذَا». فَلَمَّا بَلَغَ ذَلِكَ الْمَكَانَ قَرَأَهُ عَلَى النَّاسِ، وَأَخْبَرَهُمْ بِأَمْرِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ. [تحفة 9783].Anas said that ‘Uthman got the Qur’an transcribed and sent its copies to far-off places. ‘Abdullah bin ‘Umar, Yahya bin Sa‘id, and Malik consider it permissible, and some people of Hijaz supported this opinion depending on the narration of the Prophet ﷺ, when the Prophet ﷺ got some instructions written to be given to the commander of the army, and told him (the commander) not to read them till he had reached such and such place. When that commander reached that place he read out what had been written to the people and informed them of the orders of the Prophet ﷺ.