2 Thessalonians 2:13

But we are bound to give thanks to God always for you, brethren, beloved of the Lord, because God hath from the beginning chosen you to Salvation, thro' sanctification of the Spirit and belief of the truth.

Titus 1:2

In hope of eternal life, which God, who cannot lie, promised before the world began;

Hebrews 6:13

For when God made the promise to Abraham, because he could swear by no greater,

Hebrews 6:17

Wherefore God being willing to shew more abundantly to the heirs of the promise the unchangeableness of his counsel, interposed by an oath:

Treasury of Scripture Knowledge

Summary

Once have I sworn by my holiness that I will not lie unto David.

That i will not lie

Bible References

Once

Hebrews 6:13
For when God made the promise to Abraham, because he could swear by no greater,

That i will not lie

2 Thessalonians 2:13
But we are bound to give thanks to God always for you, brethren, beloved of the Lord, because God hath from the beginning chosen you to Salvation, thro' sanctification of the Spirit and belief of the truth.
Titus 1:2
In hope of eternal life, which God, who cannot lie, promised before the world began;