2 Thessalonians 2:13

But we ought to give thanks to God always for you, brethren beloved of the Lord, because God chose you from the beginning unto salvation through sanctification of the Spirit and belief of the truth;

Titus 1:2

in the hope of eternal life, which God who cannot lie, promised before the eternal times,

Hebrews 6:13

For God having promised Abraham, since he had no greater one by whom to swear, swore by himself,

Hebrews 6:17

but God, in this wishing more abundantly to show forth to the heirs of the promise the immutability of his counsel, confirmed it 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 God having promised Abraham, since he had no greater one by whom to swear, swore by himself,

That i will not lie

2 Thessalonians 2:13
But we ought to give thanks to God always for you, brethren beloved of the Lord, because God chose you from the beginning unto salvation through sanctification of the Spirit and belief of the truth;
Titus 1:2
in the hope of eternal life, which God who cannot lie, promised before the eternal times,