Ramayana
सो ऽहं दृष्टबलस्तुभ्यमिच्छामि हरिपुङ्गव । त्वया सह चिरं सख्यं सुस्निग्धं पावकाग्रतः ॥ 7-34-40 ॥
"Having thus witnessed your strength, O bull among apes, I desire a lasting and most affectionate friendship with you, sworn before the fire."
english translation