۞ وَوَٰعَدۡنَا مُوسَىٰ ثَلَٰثِينَ لَيۡلَةٗ وَأَتۡمَمۡنَٰهَا بِعَشۡرٖ فَتَمَّ مِيقَٰتُ رَبِّهِۦٓ أَرۡبَعِينَ لَيۡلَةٗۚ وَقَالَ مُوسَىٰ لِأَخِيهِ هَٰرُونَ ٱخۡلُفۡنِي فِي قَوۡمِي وَأَصۡلِحۡ وَلَا تَتَّبِعۡ سَبِيلَ ٱلۡمُفۡسِدِينَ
Wa waa'adnaa Moosaa salaaseena lailatanw wa at mamnaahaa bi'ashrim fatamma meeqaatu Rabbihee arba'eena lailah; wa qaala Moosaa liakheehi Haaroonakh lufnee fee qawmee wa aslih wa laa tattabi' sabeelal mufsideen
We appointed for Moses thirty nights, and completed (the period) with ten (more): thus was completed the term (of communion) with his Lord, forty nights. And Moses had charged his brother Aaron (before he went up): "Act for me amongst my people: Do right, and follow not the way of those who do mischief."
— Al-A'raf (ٱلْأَعْرَاف), 7:142
