﴿ قَالَ رَبِّ ٱجْعَل لِّىٓ ءَايَةًۭ ۖ قَالَ ءَايَتُكَ أَلَّا تُكَلِّمَ ٱلنَّاسَ ثَلَٰثَةَ أَيَّامٍ إِلَّا رَمْزًۭا ۗ وَٱذْكُر رَّبَّكَ كَثِيرًۭا وَسَبِّحْ بِٱلْعَشِىِّ وَٱلْإِبْكَٰرِ ﴾

“[Zachariah] prayed: "O my Sustainer! Appoint a sign for me!" Said [the angel]: "Thy sign shall be that for three days thou wilt not speak unto men other than by gestures. And remember thy Sustainer unceasingly, and extol His limitless glory by night and by day."”

He said ‘My Lord! Appoint for me a sign’ that is an indication of my wife’s pregnancy. He said ‘Your sign for this is that you shall not speak to men that is you shall refrain from speaking to them but not from remembrance of God save by tokens gestures for three days and nights. And remember your Lord often and glorify perform prayer at evening and dawn’ at the end of the day and at its beginning.