Al-Kahf 18:76

Qala in saaltuka AAan shay-in baAAdahafala tusahibnee qad balaghta min ladunnee AAuthra

[Moses] said, "If I should ask you about anything after this, then do not keep me as a companion. You have obtained from me an excuse."

He (Mūsā) said, “If I ask you about something after this, do not allow me your company. You have now reached a point where you have a valid excuse (to part with me) from my own side. “