Hadith.3597 - It is reported from al-Fadl ibn Abi Qurrah that he said
I asked Abu Abdillah (as), "These people claim that the earnings of a teacher are unlawful."
Imam (as) replied: "The enemies of Allah (swt) have lied! They only intend to prevent their children from learning the Quran. If a man were to give the teacher the blood money of his child, it would be lawful for the teacher."