Ulum al Qur'an
The Prophet sent Teachers
The Prophet sent teachers to communities in other places so that they might receive instruction in Islam and the Qur'an.
The case of Mus'ab bin 'Umair illustrates that this was so even before the hijra:
'When these men (of the first pledge of 'Aqaba) left (for Madina) the apostle sent with them Mus.'ab bin 'Umair ... and instructed him to read the Qur'an to them and to teach them Islam and to give them instruction about religion. In Madina Musiab was called "the reader".'
[Ibn Hisham, p. 199.]Another well-known case concerns Mu'adh bin Jabal who was sent to Yemen to instruct the people there.