Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Kummāsadāyaka Thera
Kummāsadāyaka Thera:An arahant.Ninety-one kappas ago,having nothing else to give,he put sour gruel into the bowl of Vipassī Buddha (Ap.ii.415).He is evidently identical with Sīvaka Thera.ThagA.i.307.