ॐ यस्मिन्सर्वाणि भूतानि

7th Mantra of Isa-Upanishad.

ॐ यस्मिन्सर्वाणि भूतानि आत्मैवाभूद्विजानतः । 
तत्र को मोहः कः शोक एकत्वमनुपश्यतः ।।७।।
 

When, to the knower (the man who has realized the Supreme Reality), all those being have become the Self (Ataman). For him how can there be delusion or sorrow, when he sees the Oneness (every-where)?