And the ascetic, resembling a mad man, taking from his head that garland, whose odour was maddening six-footed (black-bees), threw it on the sovereign of the celestials. And thereon the king of the immortals, taking the wreath, placed it over the head of Airavata; and thus placed, the same appeared like the Jahnavi on the peak of Kailasa.

In plain words: Durvasa took the sweet-smelling garland, which drew swarms of bees, and threw it to Indra. Indra did not wear it. He put it on his elephant's head, where it looked like the Ganges river flowing on Mount Kailasa.