قالَ رَبِّ اجعَل لي آيَةً ۚ قالَ آيَتُكَ أَلّا تُكَلِّمَ النّاسَ ثَلاثَ لَيالٍ سَوِيًّا

He asked, “My Lord, give me a sign.” He replied, “Your sign is that you won’t speak to people for three consecutive nights.”