سورة النحل

Imam Baqir (peace be upon him): لِسَانُ الَّذِی یُلْحِدُونَ إِلَیْهِ أَعْجَمِیٌّ [The tongue of him whom they lean towards is foreign]; what is meant is the tongue of Abu Fukayha, who was a slave and servant of the Banu al-Hadrami tribe. He had a non-Arabic tongue and had followed the Prophet (peace be upon him and his family) and believed in him, while he was from the People of the Book. The Quraysh said: "By Allah! This person is teaching Muhammad (peace be upon him and his family) and instructing him in his own tongue"; Allah said: وَهَذَا لِسَانٌ عَرَبِیٌّ مُّبِینٌ [while this is a clear Arabic tongue].

Ibn Abbas (may Allah have mercy on him): The Quraysh used to say, "The Quran is not from Allah; a person named Bal'am is teaching it to the Prophet." He was a blacksmith in Mecca, a Roman Christian. Al-Dahhak said, "The person referred to is Salman al-Farsi (may Allah have mercy on him)." Mujahid said, "The person referred to was a slave named Ya'ish who belonged to Banu al-Hadrami." So the verse was revealed: وَ لَقَدْ نَعْلَمُ أَنَّهُمْ یَقُولُونَ إِنَّما یُعَلِّمُهُ بَشَرٌ لِسانُ الَّذی یُلْحِدُونَ إِلَیْهِ أَعْجَمِیٌّ وَ هذا لِسانٌ عَرَبِیٌّ مُبینٌ [And indeed We know that they say, "It is only a human being who teaches him." The tongue of the one they refer to is foreign, while this is a clear Arabic tongue].