Strong G3727 ὅρκος horkos · oath

Hebrews

1. Hebrews 6:16
   For men verily swear by the greater: and an oath for confirmation is to them an end of all strife.
2. Hebrews 6:17
   Wherein God, willing more abundantly to shew unto the heirs of promise the immutability of his counsel, confirmed it by an oath: