KJV:
But they, supposing him to have been in the company, went a day's journey; and they sought him among their kinsfolk and acquaintance.
NASB:
but supposed Him to be in the caravan, and went a day's journey; and they began looking for Him among their relatives and acquaintances.
KJV:
And when they found him not, they turned back again to Jerusalem, seeking him.
NASB:
When they did not find Him, they returned to Jerusalem looking for Him.
KJV:
Then departed Barnabas to Tarsus, for to seek Saul:
NASB:
And he left for Tarsus to look for Saul;