'Twelve Apostles' in the Bible

Now these are the names of the twelve apostles: first Simon, called Peter, and Andrew his brother; Philip, and Bartholomew;

And when the hour was come, He sat down and the twelve apostles with Him.

And while He was yet speaking, behold a multitude; and he that was called Judas, one of the twelve apostles, came before them, and drew near unto Jesus to kiss Him:

Now He spake of Judas Iscariot, the son of Simon; for he was about to betray Him, though he was one of the twelve apostles.

And the wall of the city had twelve foundations, and on them the names of the twelve apostles of the Lamb.