Krishna is Yogeshwara
यत्र योगेश्वर: कृष्णो यत्र पार्थो धनुर्धर: ।
तत्र श्रीर्विजयो भूतिध्रुवा नीतिर्मतिर्मम ||
Bhagavath Geetha 18.78 Sloka
Meaning:-
Wherever there is Shree Krishna, the Lord of all Yoga/Yogis, and wherever there is Arjun, the supreme archer, there will also certainly be unending opulence, victory, prosperity, and righteousness. Of this, I am certain.
योगेश्वर: कृष्णो Yogeshwara Krishna
Lord of all Yoga/Yogi