2 Thessalonians 2:13

But, Brothers, whom the Lord loves, it is our duty always to thank God about you, for, from the first, God chose you for Salvation through the purifying influence of the Spirit, and your belief in the Truth.

Titus 1:2

and is based on the hope of Immortal Life, which God, who never lies, promised before the ages began,

Hebrews 6:13

When God gave his promise to Abraham, since there was no one greater by whom he could swear, he swore by himself.

Hebrews 6:17

And therefore God, in his desire to show, with unmistakable plainness, to those who were to enter on the enjoyment of what he had promised, the unchangeableness of his purpose, bound himself with 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
When God gave his promise to Abraham, since there was no one greater by whom he could swear, he swore by himself.

That i will not lie

2 Thessalonians 2:13
But, Brothers, whom the Lord loves, it is our duty always to thank God about you, for, from the first, God chose you for Salvation through the purifying influence of the Spirit, and your belief in the Truth.
Titus 1:2
and is based on the hope of Immortal Life, which God, who never lies, promised before the ages began,