Sanctify them by Your TRUTH. Your WORD is TRUTH.
John 17:17

The entirety of Your WORD is TRUTH, and every one of Your righteous judgments endures forever.
Psalm 119:160

Be diligent to present yourself approved to God, a worker who does not need to be ashamed, rightly dividing the WORD of TRUTH.
2 Timothy 2:15

Now by this we know that we know Him, if we keep His commandments. He who says, "I know Him," and does not keep His commandments is a liar, and the TRUTH is not in him. But whoever keeps His WORD, truly the love of God is perfected in him. He who says he abides in Him ought himself also to walk as He walked...I have not written to you because you do not know the TRUTH, but because you know it, and that no lie is of the TRUTH...And we know that the Son of God has come and has given us an understanding, that we may know Him who is TRUE; and we are in Him who is TRUE, in His Son Jesus Christ.
This is the TRUE God and eternal life.
1 John 1:3-6 & 21; & 5:20