'Pure' in the Bible

For from the rising of the sun, even to its setting, My name shall be great among the nations. In every place incense is going to be offered to My name, and a grain offering that is pure; for My name shall be great among the nations,” says the Lord of hosts.

For the lips of the priest should guard and preserve knowledge [of My law], and the people should seek instruction from his mouth; for he is the messenger of the Lord of hosts.