Contradiction with John 4:14
John 4:14 speaks of everlasting life through water that Jesus provides, while Numbers 21:16 describes a literal well without spiritual connotations.
John 4:14: 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.
Contradiction with Exodus 15:27
Exodus 15:27 mentions twelve wells of water at Elim, as opposed to the singular well in Numbers 21:16.
Exodus 15:27: And they came to Elim, where [were] twelve wells of water, and threescore and ten palm trees: and they encamped there by the waters.
Contradiction with Jeremiah 2:13
Jeremiah 2:13 refers to God as the fountain of living waters, contrasting with the physical well in Numbers 21:16.
Jeremiah 2:13: For my people have committed two evils; they have forsaken me the fountain of living waters, [and] hewed them out cisterns, broken cisterns, that can hold no water.
Contradiction with Isaiah 12:3
Isaiah 12:3 refers to drawing water from the wells of salvation, providing a spiritual meaning absent in Numbers 21:16.
Isaiah 12:3: Therefore with joy shall ye draw water out of the wells of salvation.
Contradiction with Revelation 7:17
Revelation 7:17 describes the Lamb leading to living fountains of waters, in contrast to the unnamed leaders or event in Numbers 21:16.
Revelation 7:17: For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes.