Ignatius of Antioch, Epistle to the Ephesians 1.13
Make every effort, then, to gather more often for the Eucharist of God and for glory. For when you meet together frequently, the powers of Satan are torn down, and his ruin is dissolved by the unity of your faith.
Nothing is better than peace, in which every war of heavenly and earthly things is brought to nothing.
Greek
Σπουδάζετε οὖν πυκνότερον συνέρχεσθαι εἰς εὐχαριστίαν θεοῦ καὶ εἰς δόξαν. ὅταν γὰρ πυκνῶς ἐπὶ τὸ αὐτὸ γίνεσθε, καθαιροῦνται αἱ δυνάμεις τοῦ Σατανᾶ, καὶ λύεται ὁ ὄλεθρος αὐτοῦ ἐν τῇ ὁμονοίᾳ ὑμῶν τῆς πίστεως.
οὐδέν ἐστιν ἄμεινον εἰρήνης, ἐν ᾗ πᾶς πόλεμος καταργεῖται ἐπουρανίων καὶ ἐπιγείων.