2 Thessalonians 2:13

But we are bound to give thanks always to God for you, brethren beloved of the Lord, that God chose you from the beginning to salvation in sanctification of the Spirit, and belief of the truth;

Titus 1:2

in hope of everlasting life, which God, who cannot lie, promised from the most ancient times,

Hebrews 6:13

For when God made a promise to Abraham, since he could swear by no greater, he swore by himself,

Hebrews 6:17

Wherefore God, wishing more abundantly to show to the heirs of the promise the immutability of his purpose, 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 when God made a promise to Abraham, since he could swear by no greater, he swore by himself,

That i will not lie

2 Thessalonians 2:13
But we are bound to give thanks always to God for you, brethren beloved of the Lord, that God chose you from the beginning to salvation in sanctification of the Spirit, and belief of the truth;
Titus 1:2
in hope of everlasting life, which God, who cannot lie, promised from the most ancient times,