BṚHADĀRAṆYAKA UPANISHAD · 4.3.19

तद् यथास्मिन्न् आकाशे श्येनो वा सुपर्णो वा विपरिपत्य श्रान्तः संहत्य पक्षौ संलयायैव ध्रियते ।
एवम् एवायं पुरुष एतस्मा अन्ताय धवति ।
यत्र सुप्तो न कं चन कामं कामयते न कं चन स्वप्नं पश्यति ॥

tad yathāsminn ākāśe śyeno vā suparṇo vā viparipatya śrāntaḥ saṃhatya pakṣau saṃlayāyaiva dhriyate ।
evam evāyaṃ puruṣa etasmā antāya dhavati ।
yatra supto na kaṃ cana kāmaṃ kāmayate na kaṃ cana svapnaṃ paśyati ॥

'And as a falcon, or any other (swift) bird, after he has roamed about here in the air, becomes tired, and folding his wings is carried to his nest, so does that person hasten to that state where, when asleep, he desires no more desires, and dreams no more dreams.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)