Garudapurana 3.24.82

3.24.82

madhye pīṭhaṃ śrīnivāsaṃ ca devī nārāyaṇaṃ praṇametpūrṇameva /
devasya savye pīṭhabhāgādvahiśca namaskāryaṃ gurudevāya caiva //

Upon the pedestal in the center, O goddess, one should bow completely to Śrīnivāsa Nārāyaṇa; / and on the left of the God, outside the region of the pedestal, obeisance should be made to the revered guru.