Leviticus 11:24, 28, 31, 39

‘By [contact with] these you will become unclean; whoever touches their carcasses becomes unclean until the evening (dusk)

and the one who picks up their carcasses shall wash his clothes and be unclean until the evening; they are unclean to you.

These [creatures] are unclean to you among all that swarm; whoever touches them when they are dead becomes unclean until evening.

‘If one of the animals that you may eat dies [of natural causes], whoever touches its carcass becomes unclean until the evening.