The Gita Series - A triune pilgrimage - 020 - Ch 02 - Slokas 38 to 40
सुखदुःखे समे कृत्वा लाभालाभौ जयाजयौ ततो युद्धाय युज्यस्व - Treating happiness and sorrow, gain and loss, and victory and defeat with equanimity, engage in battle
Krishna concludes His discourse based on Sankhya and begins His discourse on Karma Yoga.