B.G 14.24 and 25

समदुःखसुखः स्वस्थः समलोष्टाश्मकाञ्चनः। तुल्यप्रियाप्रियो धीरस्तुल्यनिन्दात्मसंस्तुतिः ॥२४॥

मानापमानयोस्तुल्यस्तुल्यो मित्रारिपक्षयोः। सर्वारम्भपरित्यागी गुणातीतः स उच्यते ॥२५॥

One who is equanimous in both sorrow and happiness, self-possessed, and regards a clod, stone, and gold as equal; who is equal towards the pleasant and unpleasant, steady, and remains unaffected by blame or praise; the person who remains balanced in honour and dishonour, treats friends and enemies alike, and has renounced all undertakings is considered to have transcended the (three) qualities.