Passage 3.5.7
Παυσανίου δὲ φυγόντος οἱ μὲν παῖδες Ἀγησίπολις καὶ Κλεόμβροτος νέοι παντάπασιν ἔτι ἦσαν, Ἀριστόδημος δὲ ἐπετρόπευεν αὐτοὺς γένους ἐγγύτατα ὤν· καὶ τὸ ἐν Κορίνθῳ Λακεδαιμονίων κατόρθωμα Ἀριστοδήμου σφίσιν ἐγένετο ἡγουμένου.
After Pausanias had fled, his sons, Agesipolis and Cleombrotus, were still altogether young, and Aristodemus, being their nearest relative, acted as their guardian. The achievement of the Lacedaemonians at Corinth occurred under Aristodemus' leadership.