Deuteronomy 23:13 in the King James Version
And thou shalt have a paddle upon thy weapon; and it shall be, when thou wilt ease thyself abroad, thou shalt dig therewith, and shalt turn back and cover that which cometh from thee:
Context
12 You shall have a place also outside of the camp where you go relieve yourself.
13 You shall have a trowel among your weapons. It shall be, when you relieve yourself, you shall dig with it, and shall turn back and cover your excrement;
14 for the LORD your God walks in the middle of your camp, to deliver you, and to give up your enemies before you. Therefore your camp shall be holy, that he may not see an unclean thing in you, and turn away from you.