LXX 2 Macc 13:12

πάντων δὲ τὸ αὐτὸ ποιησάντων ὁμοῦ καὶ καταξιωσάντων τὸν ἐλεήμονα κύριον μετὰ κλαυθμοῦ καὶ νηστειῶν καὶ προπτώσεως ἐπὶ ἡμέρας τρεῖς ἀδιαλείπτως, παρακαλέσας αὐτοὺς ὁ Ἰούδας ἐκέλευσεν παραγίνεσθαι.

So when they had all done this together, and had craved mercy of the Lord with weeping and fasting, lying prostrate on the ground for three days continually, Judas exhorted them to make themselves ready.