John 20:21

When they recognised Him and composed themselves, He naturally repeated His greeting, εἰρήνη ὑμῖν, but now adds, καθὼς … ὑμᾶς. “As the Father hath sent me, so send I you.” In these words (cf. John 17:18) He gives them their commission as His representatives. And in confirmation of it, (John 20:22) τοῦτο εἰπὼν … Ἅγιον. “He breathed on them,” ἐνεφύσησε; the same word is used in Genesis 2:7 to describe the distinction between Adam's “living soul,” breathed into him by God, and the life principle of the other animals. The breathing upon them was meant to convey the impression that His own very Spirit was imparted to them.