In Luke 22:31-32, it is written,
31 And the Lord said, Simon, Simon, behold, Satan hath desired to have you (ὑμᾶς), that he may sift you as wheat: 32 But I have prayed for thee (σοῦ), that thy (σου) faith fail not: and when thou (σύ) art converted, strengthen thy (σου) brethren. KJV, 1769
ΛΑʹ εἶπεν δὲ ὁ Κύριος, Σίμων Σίμων ἰδού, ὁ Σατανᾶς ἐξῃτήσατο ὑμᾶς τοῦ σινιάσαι ὡς τὸν σῖτον ΛΒʹ ἐγὼ δὲ ἐδεήθην περὶ σοῦ ἵνα μὴ ἐκλείπῃ ἡ πίστις σου καὶ σύ ποτε ἐπιστρέψας στήριξον τοὺς ἀδελφούς σου TR, 1550
What is the significance of the 2nd person, plural number, personal pronoun ὑμᾶς when the remainder of the pronouns are all in the singular number? The Lord Jesus Christ was speaking to Peter, so to whom does ὑμᾶς refer?