Shiva Purana
पुरा सनत्कुमारोपि दृष्ट्वापि परमेश्वरम् ॥ अज्ञानात्सर्वयोगीन्द्रमानी विनयदूषितः ॥ ३९ ॥
In the past even Sanatkumara had seen the Supreme Personality of Godhead Out of ignorance he considered himself the greatest of all yogis and was polluted with humility.
english translation
purA sanatkumAropi dRSTvApi paramezvaram ॥ ajJAnAtsarvayogIndramAnI vinayadUSitaH ॥ 39 ॥
hk transliteration by Sanscript