Kings are anointed only near a spring, that their kingship may run long and smooth, as it is said (1 Kings 1:33): 'And the king said unto them, Take with you the servants of your lord... and bring him down to Gihon.'- The Babylonian Talmud, Horayot 12a.
Whether or not kings were actually anointed only near a spring (which appears doubtful), this midrash shows how everything could be linked to a lesson, to a blessing.
