Kan. Stat. Ann. § 54-104
All oaths shall commence and conclude as follows: "You do solemnly swear," etc.; "So help you God."
Affirmation shall commence and conclude as follows: "You do solemnly, sincerely and truly declare and affirm," etc.; "And this you do under the pains and penalties of perjury."
G.S. 1868, ch. 72, § 4; October 31; R.S. 1923, 54-104.