1604. Dekker, Honest Wh., I. x. G. Las! now I see The reason why fond women loue to buy Adulterate complexion.
1694. Congreve, Double Dealer, IV. iii. O las! no indeed, Sir Paul.
1844. Mrs. Browning, House of Clouds, xii. Poets thought,not poets sigh. Las, they come together!