Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Ukkhā Sutta
Ukkhā Sutta:It would be better to cultivate thoughts of love (mettā) at morning,noon and eventide,than to give a morning gift of one hundred ukkhās and the same at noon and in the evening (S.ii.264).
The Commentary explains ukkhā as being a large pot with a large mouth (mahā-mukha-ukkhalī); SA.ii.164.