Parallel
Luke 2:44
Patriarchal Greek New Testament (1904) · Berean Standard Bible
νομίσαντες δὲ αὐτὸν ἐν τῇ συνοδίᾳ εἶναι ἦλθον ἡμέρας ὁδὸν καὶ ἀνεζήτουν αὐτὸν ἐν τοῖς συγγενέσι καὶ ἐν τοῖς γνωστοῖς·
Assuming He was in their company, they traveled on for a day before they began to look for Him among their relatives and friends.