Surah Maryam, Verse 10

قَالَ رَبِّ ٱجۡعَل لِّيٓ ءَايَةٗۖ قَالَ ءَايَتُكَ أَلَّا تُكَلِّمَ ٱلنَّاسَ ثَلَٰثَ لَيَالٖ سَوِيّٗا١٠

qāla rabbi ij'ʿal lī āyatan qāla āyatuka allā tukallima l-nāsa thalātha layālin sawiyyan

[Zechariah] said, "My Lord, make for me a sign." He said, "Your sign is that you will not speak to the people for three nights, [being] sound."