(a) Shu'bah says: I asked Mu'awiyah bin Qurrah about the teacher's wage, and he said: I hold that he is entitled to a wage.
(b) Al-Hakam said: I have not heard of anyone disliking it. Imam al-Bukhari (may Allah have mercy on him) mentions in a chapter heading that al-Hakam said: I have not heard of anyone disliking the teacher's wage. And he said: Ibn Sirin also saw no harm in the teacher's wage.
(c) Ata and Abu Qilabah saw no harm in taking a wage for teaching children.
(d) It is reported from al-Hasan (may Allah have mercy on him): When a teacher fixes a wage and then does not act justly, he is recorded among the wrongdoers.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الإجارة / 11679