Jesus commissioned his disciples and gave them the Holy Spirit. The Spirit had not yet been given earlier, because Jesus had not yet been glorified (7:39).
After his resurrection, the glorified Jesus gave the Spirit to his followers. This gift fulfilled many promises that the Spirit would be sent (14:16, 26; 15:26; 16:7, 13). It also points ahead to the Spirit’s powerful coming at Pentecost (Acts 1:4–5; 2:1–47).