'Pray' in the Bible

Now therefore, I pray you, swear unto me by the LORD, since I have shewed you kindness, that ye will also shew kindness unto my father's house, and give me a true token:

And Joshua said unto Achan, My son, give, I pray thee, glory to the LORD God of Israel, and make confession unto him; and tell me now what thou hast done; hide it not from me.

And we say, Pray let us prepare for ourselves to build the altar -- not for burnt-offering nor for sacrifice --