thirty

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thirty

1. the cardinal number that is the product of ten and three
2. a numeral, 30, XXX, etc., representing this number
3. the amount or quantity that is three times as big as ten
References in classic literature ?
And this," Emily continued, "is the thirtieth of June, eighteen hundred and eighty-one.
I hope you will be ready for a great holiday on the thirtieth of July, Mrs.
What Benjamin thereupon told me, exactly coincided with what Miserrimus Dexter had told me--as related in the thirtieth chapter of my narrative.
And on that day, of which you now commemorate the fiftieth anniversary--on that thirtieth day of April, 1789--was this mighty revolution, not only in the affairs of our own country, but in the principles of government over civilized man, accomplished.