All the gods and goddesses reach Kailash for the Holi celebration and so does Rishi Durvasa after he comes to know about it. When all the Devtas see Rishi Durvasa in Kailash, they get worried about Mahadev and Parvati. And the inevitable happens and Rishi Durvasa gets angry somehow and casts a curse on both Mahadev and Maa Parvati.