Musannaf Ibn Abi Shaybah

Hazrat A’mash narrates that Ibrahim said to me: Indeed, Ibrahim al-Taymi wishes that you teach him the recitation of Hazrat Abdullah. I said: I do not have the strength. He said: Why not, for indeed this is his intention. A’mash says: When I saw that this is what he wanted, I said: Fine, it will be in your presence. So we discussed the letters of Hazrat Abdullah. Then he said: That is sufficient for me. I said: Why do you dislike teaching in this way? He said: I dislike that I say about any verse that it is like this, but it is not so, or that I say: there is a waw in it, and there is no waw in it.