2 Samuel 7:28

And now, O Lord GOD, you are that God, and your words are true, and you have promised this goodness unto your servant:

John 17:17

Sanctify them through your truth: your word is truth.

Exodus 34:6

And the LORD passed by before him, and proclaimed, The LORD, The LORD God, merciful and gracious, longsuffering, and abundant in goodness and truth,

Numbers 23:19

God is not a man, that he should lie; neither the son of man, that he should repent: has he said, and shall he not do it? or has he spoken, and shall he not make it good?

Titus 1:2

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

Treasury of Scripture Knowledge

Summary

And now, O Lord GOD, thou art that God, and thy words be true, and thou hast promised this goodness unto thy servant:

Bible References

Thy words

Numbers 23:19
God is not a man, that he should lie; neither the son of man, that he should repent: has he said, and shall he not do it? or has he spoken, and shall he not make it good?
John 17:17
Sanctify them through your truth: your word is truth.
Titus 1:2
In hope of eternal life, which God, who cannot lie, promised before the ages began;