'Finger' in the Bible

They said this testing him, that they might have something to accuse him of. But Jesus stooped down, and wrote on the ground with his finger.

Again he stooped down, and with his finger wrote on the ground.

Then he said to Thomas, "Reach here your finger, and see my hands. Reach here your hand, and put it into my side. Don't be unbelieving, but believing."