Guru Stotram 14

"Brahma-aanandam Parama-Sukhadam Kevalam Jnyaana-Muurtim
Dvandva-Atiitam Gagana-Sadrsham Tat-Tvam-Asi-Aadi-Lakssyam
Ekam Nityam Vimalam-Acalam Sarva-Dhii-Saakssii-Bhuutam
Bhaava-Atiitam Tri-Gunna-Rahitam Sad-Gurum-Tam Namaami"

Salutations to that glorious Guru, Who is the Bliss of Brahman, Who is the Bestower of Supreme Joy, Who is the Absolute, Who is the Embodiment of Knowledge, Who is Beyond Duality, Who is Boundless and Infinite, Who is Indicated by Maha Vakyas Like Tat-Tvam-Asi (That-Thou-Art), Who is One without the Second, Who is Eternal, Who is Stainless and Pure, Who is Immovable, Who is the Witness of the Intelligence of All Beings, Who is Beyond the States of the Mind, Who is Free from the Three Gunas.