'Know' in the Bible

The governor told them that they should not eat of the most holy things [the priests’ food] until a priest stood up with Urim and Thummim [who by consulting these articles in his breastplate could determine God’s will in the matter].

“You, Ezra, are to appoint magistrates and judges in accordance with the wisdom and instruction of your God which is in your hand, so that they may judge all the people who are in the province west of the [Euphrates] River; appoint those who know the laws of your God; and you may teach anyone who does not know them.