Because we focused on the snake, we missed the scorpion.

Beware of a silent dog and still water.

Dig your well before you’re thirsty.

Look before you leap, for snakes among sweet flowers do creep.

There’s many a slip ‘twixt the cup and the lip.

Let a horse drink when he will, not what he will.

Leave well enough alone.

Mind your p’s and q’s.

Step on a crack; break your mother’s back.

A stitch in time, saves nine.