Origen, De oratione

ὥσπερ οὖν ταῦτα οὐ κατὰ συντυχίαν νομιστέον γίνεσθα(??)ὶ ὅτε γίνεται. τοῦ ἠριθμηκότος πάσας τὰς τρίχας τῆς τῶν ἁγίων κεφαλῆς ἁρμονίως συναγαγόντος παρὰ τὸν καιρὸν τῆς εὐχῆς τὸν ὑπηρέτην ἐσόμενον τῷ δεομένῳ τῆς εὐποιΐας τῆς ἀπ᾿ αὐτοῦ εἰσακούοντα. τῷ πιστῶς δεδεημένῳ· οὕτως ὑποληπτέον συνάγεσθαί ποτε τῶν ἐπισκοπούντων καὶ λειτουργούντων τῷ θεῷ ἀγγέλων παρουσίαν τῷδέ τινι τῶν εὐχομένων, ἵνα συμπνεύσωσιν οἷς ὁ εὐχόμενος ἠξίωσεν. ἀλλὰ καὶ ὁ ἑκάστου ἄγγελος, „καὶ τῶν“ ἐν τῇ ἐκκλησίᾳ „μικρῶν,“ „διὰ παντὸς“ βλέπων „τὸ πρόσωπον τοῦ πατρὸς“ „τοῦ ἐν τοῖς οὐρανοῖς“ καὶ ἐνορῶν τοῦ κτίσαντος ἡμᾶς τὴν θειότητα, συνεύχεταί τε ἡμῖν καὶ συμπράττει ἐν οἷς δυνατόν ἐστι περὶ ὧν εὐχόμεθα.

Just as, then, one must think that these things do not happen by chance when they happen, since he who has numbered all the hairs of the head of the saints has harmoniously brought together, at the time of the prayer, the one who is to be the minister of the benefit coming from him to the one in need, and who hearkens to the one who has asked in faith; so one must suppose that the presence of the angels who oversee and minister to God is sometimes brought together for some particular one of those who pray, so that they may join their breath to what the one who prays has asked. But also the angel of each one, 'even of the little ones' in the church, 'always' seeing 'the face of the Father' 'who is in heaven', and gazing upon the divinity of the one who created us, prays with us and works with us, as far as it is possible, for the things for which we pray.