New Living Translation
If I had not confessed the sin in my heart, the Lord would not have listened.

American Standard Version
If I regard iniquity in my heart, The Lord will not hear:

Berean Study Bible
If I had cherished iniquity in my heart, the Lord would not have listened.

Douay-Rheims Bible
If I have looked at iniquity in my heart, the Lord will not hear me.

English Revised Version
If I regard iniquity in my heart, the Lord will not hear:

King James Bible
If I regard iniquity in my heart, the Lord will not hear me:

World English Bible
If I cherished sin in my heart, the Lord wouldn't have listened.

Young's Literal Translation
Iniquity, if I have seen in my heart, The Lord doth not hear.

Psalm 66:18 Additional Translations ...