Xenophon Hellenica 3.5.5

[5] Now the Lacedaemonians were ¹ glad to seize a pretext for undertaking a campaign against the Thebans, for they had long been angry with them both on account of their claiming Apollo’s tenth ² at Decelea and their refusing to follow them against Piraeus. ³ Furthermore, they charged them with persuading the Corinthians likewise not to join in that campaign. Again, they recalled that they had refused to permit Agesilaus to sacrifice at Aulis and had cast from the altar the victims already offered, and that they also would not join Agesilaus for the campaign in Asia. They also reasoned that it was a favourable time to lead forth an army against the Thebans and put a stop to their insolent behaviour toward them; for matters in Asia were in an excellent condition for them, Agesilaus being victorious, and in Greece there was no other war to hinder them.