Isaiah describes the Messianic Age as one that will be characterized by many spiritual blessings. The pleasant waters of Shiloah had been rejected by God’s people, but in the time to come Judah would joyfully draw water from the wells of salvation.
With joy you will draw water from the wells of salvation. (Isaiah 12:3 ESV)
The term mayan (wells) is often used in the Old Testament of springs, fountains, wells, or pools of water.
We might think of a well like the one where Jesus stopped at Sychar in Samaria.
Jesus answered her, “If you knew the gift of God, and who it is that is saying to you, ‘Give me a drink,’ you would have asked him, and he would have given you living water.” The woman said to him, “Sir, you have nothing to draw water with, and the well is deep. Where do you get that living water? Are you greater than our father Jacob? He gave us the well and drank from it himself, as did his sons and his livestock.” Jesus said to her, “Everyone who drinks of this water will be thirsty again, but whoever drinks of the water that I will give him will never be thirsty again. The water that I will give him will become in him a spring of water welling up to eternal life.” The woman said to him, “Sir, give me this water, so that I will not be thirsty or have to come here to draw water.” (John 4:10-15 ESV)
Or, we might think of a spring like the beautiful one at the source of the Banias River at Caesarea Philippi. This spring and river becomes a major source of the Jordan River.