Sundar Kand Verse 141
जदपि कहि कपि अति हित बानी। भगति बिबेक बिरति नय सानी॥ बोला बिहसि महा अभिमानी। मिला हमहि कपि गुर बड़ ग्यानी॥ १॥
jadapi kahi kapi ati hita bānī| bhagati bibeka birati naya sānī|| bolā bihasi mahā abhimānī| milā hamahi kapi gura baḍa़ gyānī|| 1||
jadapi kahi kapi ati hita bani bhagati bibeka birati naya sani bola bihasi maha abhimani mila hamahi kapi gura bada़ gyani 1
Although Shree Hanuman had spoken words of genuine welfare — counsel steeped in devotion, discernment, dispassion, and righteous wisdom — the supremely arrogant Ravana merely laughed and said, 'Well, well, it seems we have found ourselves a monkey-guru, and a very learned one at that!'
यद्यपि श्री हनुमान् जी ने भक्ति, विवेक, वैराग्य और नीति से सनी हुई अत्यंत हितकारी वाणी कही, तथापि महा अभिमानी रावण हँसते हुए बोला — 'देखो, हमें एक वानर गुरु मिल गया है, बड़ा ज्ञानी है!'
This is verse 141 of 351 in Sundar Kand (सुन्दरकाण्ड), from the section “In Ravana's Court” of Goswami Tulsidas’ Ramcharitmanas.