VaYikra 19:27

²⁷ לֹא תַקִּפוּ פְּאַת רֹאשְׁכֶם וְלֹא תַשְׁחִית אֵת פְּאַת זְקָנֶךָ׃

By Henry MacLagan

Verse 27. For it is unlawful to corrupt good with evil internally, or truth with falsity externally.