John 20:28
And Thomas answered and said to Him, “My Lord and my God!”

After His crucifixion, burial, and resurrection, Jesus begins to minister again to His disciples.
One day He shows up in a room present with all the disciples except Thomas.
When Thomas returns he refuses to believe the testimony of the other ten that Jesus had shown up.
Thomas refuses to believe unless he sees Jesus for himself and touches his nail prints and side.
Eight days later, Jesus shows up with all of them present. At touching the nail prints and His side, Thomas proclaims, “My Lord and my God!”
Of course, we read this verse in English, translated from Greek, the language of the New Testament.
But Thomas was Hebrew and would have spoken these words in Hebrew.
Is that significant? I think so.
There is a good possibility he used the words Adonai and Elohim, two words used throughout the OT.
Thomas did not see Jesus just as Messiah and Savior, but also as Lord and God, equating Him with the words used throughout the Law and the Prophets.