K.H.Y.'A.S. Kaaf Ha Ya 'Ain Saad (Kareem the Honored, Haadi the Guide, Yaamen the Bounteous, 'Aleem the Knower, Saadiq the True, states that)

Mention of the mercy of your Lord to His servant Zacharias.

When he called out to his Lord in the secrecy of his heart. [3:37]

He said, 'My Lord! My bones have turned brittle and my head is shining with gray hair, and I have never remained unblessed in my prayer to You, my Lord.'

Now I fear what my relatives will do after me. (I am concerned about the heritage of my ancestors such as Jacob.) But my wife is barren. Oh, Give me from Your Presence, a successor.

Let him be my heir and the heir of the house of Jacob and make him, my Lord, worthy of Your acceptance.'

He was told, 'O Zacharias! We give you the good news of a boy whose name shall be Yahya (John the Baptist). We have never given this name to anyone before.' [19:65]

Zacharias exclaimed, 'My Lord! How can I have a son when my wife is barren and I am already infirm with old age?'

He said: Thus it is. Your Lord says, 'It is easy for Me. I created you before, and you were nothing.' [The infertility in his wife was treated. 21:90]

Zacharias said, 'My Lord! Give me a special message.' He said, 'The message is that you shall not speak to people for three (days and) nights consecutively.' [3:40-41. Vow of silence - 19:26. He was not struck dumb (as claimed in Luke: 1:20-22)]