Ariya-vamsa

Ariya-vamsa: The four Noble Usage's, are:

   Contentedness of the Bhikkhu with any robe,
   Contentedness with any Alms-food,
   Contentedness with any dwelling,
   Delight in meditation and detachment. 

In the Ariya-vamsa Sutta, A. IV, 28 and similarly in D. 33, it is said :

Now the Bhikkhu is contented with any robe, with any alms-food, with any dwelling, finds pleasure and enjoyment in mental training and detachment. But neither is he haughty on that account, nor does he look down upon others. Now, of a Bhikkhu who herein is fit and indefatigable, who remains aware and clearly comprehending, of such a Bhikkhu it is said that he is firmly established in the ancient lineage of Noble Usage known as the most lofty one.

Source

Wikipedia:Ariya-vamsa