Verses with the word reason in the New Testament (19 verses):

Matthew 16:8
Which when Jesus perceived, he said unto them, O ye of little faith, why reason ye among yourselves, because ye have brought no bread?

Mark 2:8
And immediately when Jesus perceived in his spirit that they so reasoned within themselves, he said unto them, Why reason ye these things in your hearts?

Mark 8:17
And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?

Luke 5:21
And the scribes and the Pharisees began to reason, saying, Who is this which speaketh blasphemies? Who can forgive sins, but God alone?

Luke 5:22
But when Jesus perceived their thoughts, he answering said unto them, What reason ye in your hearts?

John 6:18
And the sea arose by reason of a great wind that blew.

John 12:11
Because that by reason of him many of the Jews went away, and believed on Jesus.

Acts 6:2
Then the twelve called the multitude of the disciples unto them, and said, It is not reason that we should leave the word of God, and serve tables.

Acts 18:14
And when Paul was now about to open his mouth, Gallio said unto the Jews, If it were a matter of wrong or wicked lewdness, O ye Jews, reason would that I should bear with you:

Romans 8:20
For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope,

2 Corinthians 3:10
For even that which was made glorious had no glory in this respect, by reason of the glory that excelleth.

Hebrews 5:3
And by reason hereof he ought, as for the people, so also for himself, to offer for sins.

Hebrews 5:14
But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.

Hebrews 7:23
And they truly were many priests, because they were not suffered to continue by reason of death:

1 Peter 3:15
But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:

2 Peter 2:2
And many shall follow their pernicious ways; by reason of whom the way of truth shall be evil spoken of.

Revelation 8:13
And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!

Revelation 9:2
And he opened the bottomless pit; and there arose a smoke out of the pit, as the smoke of a great furnace; and the sun and the air were darkened by reason of the smoke of the pit.

Revelation 18:19
And they cast dust on their heads, and cried, weeping and wailing, saying, Alas, alas that great city, wherein were made rich all that had ships in the sea by reason of her costliness! for in one hour is she made desolate.