World Wide Study Bible
a Bible passage
13Even Simon himself believed. After being baptized, he stayed constantly with Philip and was amazed when he saw the signs and great miracles that took place.
13. Then Simon himself believed also—Left without followers, he thinks it best to join the man who had fairly outstripped him, not without a touch of real conviction.
and … was baptized—What a light does this throw on what is called Baptismal Regeneration!
he continued with Philip—"was in constant attendance upon" him.