Patanjali Yog Sutra
स एष पूर्वेषामपि गुरु: कालेनानवच्छेदात् ॥१-२६॥
That God is also the Guru of the Gurus born in ancient times, because He is not limited by time, that is why , He is timeless and exists in all times.
english translation
वह ईश्वर प्राचीन काल में उत्पन्न गुरुगणों का भी गुरु है, क्योंकि वह काल से सीमित नहीं है अर्थात् कालातीत है व सर्वकाल में विद्यमान है ।
hindi translation
sa eSa pUrveSAmapi guru: kAlenAnavacchedAt ॥1-26॥
hk transliteration by Sanscript