Sura al-Kahf 18:76

قَالَ إِن سَأَلْتُكَ عَن شَىْءٍۭ بَعْدَهَا فَلَا تُصَٰحِبْنِى قَدْ بَلَغْتَ مِن لَّدُنِّى عُذْرًا

qalā in saʾaltuka ʿan shayʾin baʿdahā fa-lā tuṣāḥibnī qad balaghta min lladunnī ʿudhran

(Moses) said: "If ever I ask thee about anything after this, keep me not in thy company: then wouldst thou have received (full) excuse from my side."