New Revised Standard Version
Zechariah said to the angel, “How will I know that this is so? For I am an old man, and my wife is getting on in years.”

Contemporary English Version
Zechariah said to the angel, "How will I know this is going to happen? My wife and I are both very old."

New American Bible
Then Zechariah said to the angel, “How shall I know this? For I am an old man, and my wife is advanced in years.”

Douay-Rheims Bible
And Zachary said to the angel: Whereby shall I know this? For I am an old man, and my wife is advanced in years.

And Zachary said to the angel: Whereby shall I know this? For I am an old man, and my wife is advanced in years.

Whereby.

Luke 1:34 And Mary said to the angel: How shall this be done, because I know not man?

Genesis 15:8 But he said: Lord God, whereby may I know that I shall possess it?

Genesis 17:17 Abraham fell upon his face, and laughed, saying in his heart: Shall a son, thinkest thou, be born to him that is a hundred years old? and shall Sara that is ninety years old bring forth?

Genesis 18:12 And she laughed secretly, saying: After I am grown old, and my lord is an old man, shall I give myself to pleasure?

Judges 6:36-40 And Gedeon said to God: If thou wilt save Israel by my hand, as thou hast said, . . .

Isaiah 38:22 And Ezechias had said: What shall be the sign that I shall go up to the house of the Lord?

for.

Luke 1:7 And they had no son, for that Elizabeth was barren: and they both were well advanced in years.

Numbers 11:21-23 And Moses said: There are six hundred thousand footmen of this people, and sayest thou: I will give them flesh to eat a whole month? . . .

2 Kings 7:2 Then one of the lords, upon whose hand the king leaned, answering the man of God, said: If the Lord should make flood-gates in heaven, can that possibly be which thou sayest? And he said: Thou shalt see it with thy eyes, but shalt not eat thereof.

Romans 4:19 And he was not weak in faith. Neither did he consider his own body, now dead (whereas he was almost an hundred years old), nor the dead womb of Sara.