Bhagwad Gita
Chapter 14, Verse 27
ब्रह्मणो हि प्रतिष्ठाऽहममृतस्याव्ययस्य च।शाश्वतस्य च धर्मस्य सुखस्यैकान्तिकस्य च।।14.27।।
And I am the basis of the impersonal Brahman, which is the constitutional position of ultimate happiness, and which is immortal, imperishable and eternal.