Bhagavad Gita Chapter 10.23
rudrāṇāḿ śańkaraś cāsmi
vitteśo yakṣa-rakṣasām
vasūnāḿ pāvakaś cāsmi
meruḥ śikhariṇām aham
Translation
Of all the Rudras I am Lord Shiva, of the Yakshas and Rakshasas I am the Lord of wealth [Kuvera], of the Vasus I am fire [Agni], and of mountains I am Meru.