'Table' in the Bible

So they gave a dinner there in honour of Jesus, at which Martha waited at table, but Lazarus was one of the guests who were with Him.

rose from the table, threw off His upper garments, and took a towel and tied it round Him.

So after He had washed their feet, put on His garments again, and returned to the table, He said to them, "Do you understand what I have done to you?

There was at table one of His disciples--the one Jesus loved-- reclining with his head on Jesus's bosom.

But why He said this no one else at the table understood.