Surah Aal-i-Imraan, Verse 41
قَالَ رَبِّ ٱجْعَل لِّىٓ ءَايَةًۭ ۖ قَالَ ءَايَتُكَ أَلَّا تُكَلِّمَ ٱلنَّاسَ ثَلَٰثَةَ أَيَّامٍ إِلَّا رَمْزًۭا ۗ وَٱذْكُر رَّبَّكَ كَثِيرًۭا وَسَبِّحْ بِٱلْعَشِىِّ وَٱلْإِبْكَٰرِ
Translation — Sahih International
He said, "My Lord, make for me a sign." He Said, "Your sign is that you will not [be able to] speak to the people for three days except by gesture. And remember your Lord much and exalt [Him with praise] in the evening and the morning."
Source
Kur'an-ı Kerim, Âl-i İmrân Suresi 3:41
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/3-suresi-41-ayet