Ariya-vamsa

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

1. Contentedness of the Bhikkhu with any robe,
2. Contentedness with any Alms-food,
3. Contentedness with any dwelling,
4. 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.

References

Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.