Once
Psalm 110:4
The LORD hath sworn, and will not repent, Thou art a priest for ever after the order of Melchizedek.
Psalm 132:11
The LORD hath sworn in truth unto David; he will not turn from it; Of the fruit of thy body will I set upon thy throne.
Amos 4:2
The Lord GOD hath sworn by his holiness, that, lo, the days shall come upon you, that he will take you away with hooks, and your posterity with fishhooks.
Amos 8:7
The LORD hath sworn by the excellency of Jacob, Surely I will never forget any of their works.
Hebrews 6:13
For when God made promise to Abraham, because he could swear by no greater, he sware by himself,
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:
that I will not lie
2 Thessalonians 2:13
But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:
Titus 1:2
In hope of eternal life, which God, that cannot lie, promised before the world began;