Sankaracarya's Vivekachudamani 472

सत्समृद्धं स्वतःसिद्धं शुद्धं बुद्धमनीदृशम् ।

एकमेवाद्वयं ब्रह्म नेह नानास्ति किंचन ॥

satsamṛddhaṃ svataḥsiddhaṃ śuddhaṃ buddhamanīdṛśam |

ekamevādvayaṃ brahma neha nānāsti kiṃcana ||

(Sankaracarya's Vivekachudamani 472)

Self-existing, Self-evident, pure Intelligence, unlike anything finite, non-dual, there is only the Brahman; in It there is no plurality whatsoever.

The Lord exist in every atom and molecule, The lord even appears in stone, water, fire, ether, sky, air and etc. There is no limit for the Lord. Only human and condition souls are limited. There is only God(Brahman). Hereby Sankaracarya clearly stated there cannot be two Gods. In Brahma Samhita, Lord Brahma said the only God is ' Govindah sarva-karana karanam' Govinda is the cause of all causes.