Passage 8.27.13
Λακεδαιμόνιοι δὲ αὐτοί τε πανδημεὶ καὶ ὁ τῆς οἰκίας βασιλεὺς τῆς ἑτέρας Ἆγις ὁ Εὐδαμίδου στρατεύουσιν ἐπὶ Μεγάλην πόλιν παρασκευῇ μείζονι καὶ ἀξιολογωτέρᾳ τῆς ὑπὸ Ἀκροτάτου συναχθείσης· καὶ μάχῃ τε ἐπεξελθόντας τοὺς Μεγαλοπολίτας ἐνίκησαν καὶ μηχάνημα ἰσχυρὸν προσάγοντες τῷ τείχει τὸν πύργον τὸν ταύτῃ διʼ αὐτοῦ σείουσι καὶ ἐς τὴν ὑστεραίαν καταρρίψειν τῷ μηχανήματι ἤλπιζον.
The Lacedaemonians themselves marched out in full force, along with Agis the son of Eudamidas, king of the other royal house, against Megalopolis, with more substantial preparation of greater significance than that previously assembled by Acrotatus. In battle they defeated the Megalopolitans, and bringing up a powerful siege engine against the wall at this point, shook the tower by means of it, and expected to overthrow it on the next day with their machine.