Question

Why did the poet wait for the snake to quench in thirst first?

Answer 1

As the snake was the first to arrive there.
Poet had etiquettes and he waited for the snake to quench his thirst first
Hope it helps:):D

Answer 2

as poet considered the snake as a guest and thought that snake is a first comer and the poet was second comer so he waited till snake quench his thirst.