Preparing For Sunday

Ἔλεγον πάλιν περὶ αὐτοῦ, ὅτι ὀψὲ σαββάτων ἐπιφωσκούσης Κυριακῆς, ἤφιε τὸν ἥλιον ὀπίσω αὐτοῦ, καὶ ἔτεινε τὰς χεϊρας αὐτοῦ εἰς τὸν οὐρανὸν εὐχόμενος, ἕως πάλιν ἔλαμψεν ὁ ἥλιος εἰς τὸ πρόσωπον αὐτοῦ· καὶ οὕτως ἐκαθὲζετο. Ἄποφθέγματα των Αγίων Γερόντων, Παλλάδιος Ελενουπόλεως Source: Migne PG 65.97c

Again they was said of Father Arsenius that on the evening before the Lord's day, he would turn his back on the sun and stretch out his hands to heaven in prayer, until the sun shone on his face again, and then he would sit.   Sayings of the Desert Fathers, Palladius of Galatia