'Fours' in the Bible

‘All winged insects that walk on all fours are detestable to you;

yet of all winged insects that walk on all fours you may eat those which have legs above their feet with which to leap on the ground.

Whatever crawls on its belly, and whatever walks on all fours, and whatever has many feet among all things that swarm on the ground, you shall not eat; for they are detestable.