Jn 4:13-14, Jn 6:35, Jn 7:37-39, 1 Cor 10:4, Rev 22:17
In the Old Testament, God said that He would protect us like a watered garden. (Isa 58:11)
Isa 58:11 And the Lord shall guide thee continually, and satisfy thy soul in drought, and make fat thy bones: and thou shalt be like a watered garden, and like a spring of water, whose waters fail not.
In the Old Testament, the Israelites could live in the wilderness by drinking the spiritual drink given by Christ, the spiritual rock. (1 Corinthians 10:4)
1 Corinthians 10:4 And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ.
Those who believe in Jesus as the Christ will never thirst. (John 4:13-14, John 6:35)
John 4:13 Jesus answered and said unto her, Whosoever drinketh of this water shall thirst again: 14 But whosoever drinketh of the water that I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life.
John 6:35 And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.
The Holy Spirit comes upon those who believe in Jesus as the Christ, like a river of living water. (John 7:37-39)
John 7:37 In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink. 38 He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water. 39 (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
We will receive the water of eternal life freely in heaven. (Rev 22:17)
Rev 22:17 And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely.