Valmiki Ramayana Bala Kanda Sarga 48 Shloka 25

अथ subsequently, देवदानवदुर्धर्षम् unassilable by devatas and danavas, तपोबलसमन्वितम् endowed with power of ascetism, तीर्थेंदकपरिक्लिन्नम् drenched with by sacrifical waters, अनलमिव like flaming fire, दीप्यमानम् shining, गृहीतसमिधम् carrying sacrificial fuel sticks, सकुशम् along with Kusha grass, मुनिपुङ्गवम् preeminent among sages, गौतमं महामुनिम् great ascetic Gautama, तत्र there, प्रविशन्तम् entering, ददर्श beheld.

Subsequently, Indra beheld the great ascetic Gautama, unassailable by devatas and danavas, endowed with the power of ascetism, drenched with sacrifical waters, shining like flaming fire, carrying sacrificial firewood and Kusha grass and preeminent among sages, entering that leaf hut.