Thanks be to God, thanks be to God!
All of His gifts are magnificent; 
                    yet one exceeds them all.

From mother and father, brother and sis,
there's no greater reason to thank God than this:
He sent us a Savior, His own perfect gift,
to breach our unworthiness, to heal the rift.
Without Christ to forgive us and call us His own,
we have not one merit to bring to His throne,
so thank God for blessings
this Thanksgiving Day.
Review them, renew them,
and most humbly say:
Thank You for Your love-gifts,
we cherish each one,
but one gift's incomparable -- Jesus, Your Son!

In 2nd Corinthians 9:15, many versions, but one conclusion:
Thanks be unto God for his unspeakable gift.  
                            King James V.

Thanks be to God for his indescribable gift!  
                       New American Bible

Let us thank God for his priceless gift! 
         Good News New Testament

Thanks be to God for his inexpressible gift! 
               Revised Standard Version

Thank God for his Son--his Gift too wonderful for words. 
                                     The Living Bible

Now thanks be to God for His Gift, (precious)  beyond telling  [His indescribable, inexpressible, free Gift] - The Amplified Bible