'Discern' in the Bible

Her priests have done violence to my law, and have profaned my holy things: they have made no distinction between the holy and the common, neither have they caused men to discern between the unclean and the clean, and have hidden their eyes from my Sabbaths, and I am profaned among them.

They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.