3B Hence, the striking of the rock by Moses' staff signifies that Christ was put to death on the cross by the authority of God's law—cf. Gal. 2:19-20a; 3:13.
4C Christ as the living, spiritual rock was smitten by the authority of God's law so that the water of life in resurrection could flow out of Him and into His redeemed people for them to drink—Exo. 17:6; 1 Cor. 10:4:
51 Christ is our begetting rock and the rock who is our salvation, strength, refuge, hiding place, protection, covering, and safeguard—Deut. 32:18; 2 Sam. 22:47; Psa. 95:1; 62:7; 94:22; Isa. 32:2.
62 Blood and water flowed out of the Lord's pierced side on the cross; the blood for our judicial redemption saves us from the guilt of sin, and the water of life in resurrection for our organic salvation saves us from the power of sin—Gen. 2:21-22; John 19:34; Zech. 13:1; Psa. 36:8-9; Rev. 21:6; Hymns, #1058, stanza 1.