Bhagavad Gita 3.24
उत्सीदेयुरिमे लोका न कुर्यां कर्म चेदहम्। सङ्करस्य च कर्ता स्यामुपहन्यामिमाः प्रजाः।।3.24।।
utsīdeyurime lokā na kuryāṃ karma cedaham| saṅkarasya ca kartā syāmupahanyāmimāḥ prajāḥ||3.24||
utsideyurime loka na kuryam karma cedaham sankarasya ca karta syamupahanyamimah prajah3.24
Meaning
If Krishna did not engage in action, these worlds would be destroyed, He would be the cause of confusion and chaos, and all beings would perish.
यदि मैं कर्म न करूँ, तो ये समस्त लोक नष्ट हो जायेंगे; और मैं वर्णसंकर का कर्ता तथा इस प्रजा का हनन करने वाला होऊँगा।
This is verse 24 of 43 in Chapter 3 (Karma Yoga) of the Bhagavad Gita.