Bhagavad Gita Verse 9.15

दूसरे ज्ञानयोगी मुझ निर्गुण-निराकार ब्रह्मका ज्ञानयज्ञके द्वारा अभिन्नभावसे पूजन हुए भी मेरी उपासना करते हैं और दूसरे मनुष्य बहुत प्रकारसे स्थित मुझ विराट्स्वरूप परमेश्वरकी पृथक् भावसे उपासना करते हैं|

Several people worship Me in different ways, My dear friend. Some choose to worship Me with their offering of knowledge (Gyan Yagya); others worship Me in my absolute (formless) form as part of their own self; and still others choose to worship Me as their Divine Master, in My several different and diverse forms. However, Arjuna, realize that I am One and Universal even though I take on several forms.