What does the Bible say about Thomas the disciple?

In John 20:24-25, Thomas is introduced as one of the twelve apostles who was absent when Jesus first appeared to the others after His resurrection. Upon hearing their claims that they had seen the Lord, he expressed disbelief, stating he would only believe if he could physically see and touch the wounds of Christ. This situation has led Thomas to be famously referred to as 'Doubting Thomas.' His actions and the subsequent revelation of Christ highlight the themes of faith, doubt, and the nature of belief in relation to empirical evidence.