'Finger' in the Bible

They said this, testing him, so that they might have something against him. But Jesus, with his head bent down, made letters on the floor with his finger.

So the other disciples said to him, We have seen the Lord. But he said to them, If I do not see in his hands the print of the nails and put my finger into the print of the nails, and if I do not put my hand into his side, I will never have belief.

Then he said to Thomas, Put out your finger, and see my hands; and put your hand here into my side: and be no longer in doubt but have belief.