Didache

And on the Lord's own day gather yourselves together and break bread and give thanks, first confessing your transgressions, that your sacrifice may be pure.

Κατὰ κυριακὴν δὲ κυρίου συναχθέντες κλάσατε ἄρτον καὶ εὐχαριστήσατε, προεξομολογησάμενοι τὰ παραπτώματα ὑμῶν, ὅπως καθαρὰ ἡ θυσία ὑμῶν ᾖ.

And let no man, having his dispute with his fellow, join your assembly until they have been reconciled, that your sacrifice may not be defiled;

πᾶς δὲ ἔχων τὴν ἀμφιβολίαν μετὰ τοῦ ἑταίρου αὐτοῦ μὴ συνελθέτω ὑμῖν, ἕως ὁ??ʼ διαλλαγῶσιν, ἵνα μὴ κοινωθῇ ἡ θυσία ὑμῶν.