Valmiki Ramayana Bala Kanda Sarga 63 Shloka 17
Original Shlokaदेवतानां वच श्शृत्वा सर्वलोकपितामह:। अब्रवीन्मधुरं वाक्यं विश्वामित्रं तपोधनम्।।1.63.17।।
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सर्वलोकपितामह: grandsire of the worlds, Brahma, देवतानाम् devatas, वच: words, श्रुत्वा haivng heard, तपोधनम् great ascetic, विश्वामित्रम् Visvamitra, मधुरम् sweet, वाक्यम् words, अब्रवीत् spoke.
Having heard the gods, the Grandsire of the worlds (Brahma) addressed Viswamitra whose wealth was his ascetism in these sweet words.