Barnabas wanted to take with them John called Mark.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.
(New Revised Standard Bible Version Online)
New International Version
but Paul did not think it wise to take him, because he had deserted them in Pamphylia and had not continued with them in the work.