Musannaf Ibn Abi Shaybah

Hazrat Laith says that Hazrat Mujahid explained the meaning of this verse as follows, verse { فَلاَ تَقُلْ لَہُمَا أُفٍّ }: When both of them reach old age and begin to do those actions which he used to do in his childhood, then he should not say "uff" to them.