'Hereby' in the Bible

Then he went out to the spring of waters and threw the salt [into it] there and said, "Thus says Yahweh, 'I hereby purify these waters; let there be no longer any death or unproductiveness from it.'"

You must take the flask of olive oil and pour it out on his head. You must say, 'Thus says Yahweh, "I hereby anoint you as king over Israel." ' Then you must open the door and flee; do not linger!"

He got up and went to the house, and poured the olive oil on his head and said to him, "Thus says Yahweh, the God of Israel: 'I hereby anoint you as king over the people of Yahweh, over Israel.

Then they said, "Liar. Please tell us." He said, "{Thus and so} he said to me, saying, 'Thus says Yahweh, "I hereby anoint you as king over Israel." '"