Jesus came, although the doors were locked, and stood in their midst and said, "Peace be with you." Then he said to Thomas, "Put your finger here and see my hands, and bring your hand and put it into my side, and do not be unbelieving, but believe." Thomas answered and said to him, "My Lord and my God!" (Jn 20:24-29)
https://bible.usccb.org/bible/readings/070323.cfm
Despite centuries of preachers stating the opposite, the Fourth Gospel never says that Thomas touched the Risen Lord. Instead, Thomas gives us the highest confession of Jesus in all the New Testament: “My Lord and my God!” And wins a blessing for all of us to boot: “Blessed are those who have not seen and have believed."