Kubera was made the lord of riches and of all the Rakshasas. Meru was made the king of the mountains, and Oceans was made the lord of the rivers.
धनानां राक्षसानां च कुबेरमपि चेश्वरम्। पर्वतानां पति मेरुं सरितां च महोदधिम्॥