He seemeth not to speak of what God will do in the general resurrection, but of those whom the Lord raised up from the dead in the Old Testament, by Elijah and Elisha. The giving of and restoring unto life, are things proper unto God, Deuteronomy 32:39 1 Samuel 2:6. So the Son quickeneth whom he will: God hath given unto me a power to raise from the dead whom I will; as he did raise up Jairus's daughter, Matthew 9:25, and the widow's son, Luke 7:14, and Lazarus. 1 Thessalonians 11:43. This was one of those greater works, of which our Saviour spake in the former verse.
Related Commentaries of John 5:21
John 5:21
21 For as the Father raiseth up the dead, and quickeneth them; even so the Son quickeneth whom he will.