'On Earth' in the Bible

When everyone who had known him previously saw him prophesying with the prophets, the people all asked one another, "What on earth has happened to the son of Kish? Does even Saul belong with the prophets?"

For as long as the son of Jesse lives upon earth, thou shalt not be established, nor thy kingdom. And now send and fetch him to me, for he must die.

And see ye, and know of all the hiding places where he will hide there, and turn back to me prepared, and I went with you: and it being if he is on earth, and I sought him in all the thousands of Judah.