Mundaka UpanishadMundaka Upanishad 3.1.1
द्वा सुपर्णा सयुजा सखाया समानं वृक्षं परिषस्वजाते
Dvā suparṇā sayujā sakhāyā, samānaṃ vṛkṣaṃ pariṣasvajāte
Two birds, inseparable companions, perch on the same tree; one eats the sweet fruit, the other looks on without eating.
— Ekam (simplified)
📖 Story
Made to sit upon a burning iron plate as scorching sand was poured over him, Guru Arjan uttered no cry of complaint. “Tera kiya meetha laage” — sweet is Your will to me — was all he breathed. Agony and peace he met with the same steady, God-filled calm.