Deuteronomy 23:13

And you shall have a stick with your weapons; and it shall be, when you will relieve yourself outside, you shall dig with it, and shall turn back and cover your refuse:

Ezekiel 24:6-8

Therefore thus says the Lord GOD; Woe to the bloody city, to the pot whose scum is in it, and whose scum has not gone out of it! bring it out piece by piece; let no lot fall upon it.

Treasury of Scripture Knowledge

Summary

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:

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Bible References

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Ezekiel 24:6
Therefore thus says the Lord GOD; Woe to the bloody city, to the pot whose scum is in it, and whose scum has not gone out of it! bring it out piece by piece; let no lot fall upon it.