If He had, we would celebrate that sacrament.
But He didn't. This is why no-one celebrates a sacrament of drinking water today.
But - at the Last Supper - Christ did institute the sacrament of His Body and Blood. He spoke in metaphor about living water - but he spoke literally about His body and blood.
He commands us to eat His Body and Blood. His words are unmistakeable.
Why do you not believe? He offers you His Body and Blood.
Nope; He spoke in literally about living water - but he spoke metaphor about His body and blood.