'Pure' in the Bible

"Command the children of Israel, that they bring to you pure olive oil beaten for the light, to cause a lamp to burn continually.

He shall keep in order the lamps on the pure gold lampstand before Yahweh continually.

You shall set them in two rows, six on a row, on the pure gold table before Yahweh.

You shall put pure frankincense on each row, that it may be to the bread for a memorial, even an offering made by fire to Yahweh.