Jesus said to the Samaritan woman:

But whoever drinks of the water that I shall give him will never thirst. But the water that I shall give him will become in him a fountain of water springing up into everlasting life.” John 4:14
Why could Jesus be sure that after drinking the water that He gives a person would never thirst? Jesus could be sure is because He is the fountain of living waters. The bible says:

O LORD, the hope of Israel,

All who forsake You shall be ashamed.
“Those who depart from Me
Shall be written in the earth,
Because they have forsaken the LORD,
The fountain of living waters.”  Jeremiah 17:13
So if Jesus is the fountain of living waters and Jesus does this mean that you and I only need to drink once or better yet does this mean that we will only want to drink once?
The answer is no. The bible says:
Blessed are those who hunger and thirst for righteousness,
For they shall be filled. Matthew 5:6
He said to me, “It is done! I am the Alpha and the Omega, the Beginning and the End. I will give of the fountain of the water of life freely to him who thirsts. Revelation 21:6
What Jesus is trying to say is that if you know Him you will never be at a point where you are thirsty and have nothing to drink. In fact because Jesus is the fountain of living waters there will always be something to drink. That’s a good thing because Christ’s followers love to drink from the Fountain of waters.

Are you thirsty? I know I am.