Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 48-49
Sanskrit:
देश: काल: पृथग्द्रव्यं मन्त्रतन्त्रर्त्विजोऽग्नय: ।देवता यजमानश्च क्रतुर्धर्मश्च यन्मय: ॥ ४८ ॥स एव भगवान् साक्षाद् विष्णुर्योगेश्वरेश्वर: ।जातो यदुष्वित्याशृण्म ह्यपि मूढा न विद्महे ॥ ४९ ॥
ITRANS:
deśaḥ kālaḥ pṛthag dravyaṁmantra-tantrartvijo ’gnayaḥdevatā yajamānaś cakratur dharmaś ca yan-mayaḥ
Translation:
All the aspects of sacrifice — the auspicious place and time, the various items of paraphernalia, the Vedic hymns, the prescribed rituals, the priests and sacrificial fires, the demigods, the patron of the sacrifice, the sacrificial offering and the pious results obtained — all are simply manifestations of His opulences. Yet even though we had heard that the Supreme Personality of Godhead, Viṣṇu, the Lord of all mystic controllers, had taken birth in the Yadu dynasty, we were so foolish that we could not recognize Śrī Kṛṣṇa to be none other than Him.