Verses with the word sweareth in the New Testament (4 verses):

Matthew 23:18
And, Whosoever shall swear by the altar, it is nothing; but whosoever sweareth by the gift that is upon it, he is guilty.

Matthew 23:20
Whoso therefore shall swear by the altar, sweareth by it, and by all things thereon.

Matthew 23:21
And whoso shall swear by the temple, sweareth by it, and by him that dwelleth therein.

Matthew 23:22
And he that shall swear by heaven, sweareth by the throne of God, and by him that sitteth thereon.