Mahabharata 12.327.41

ऊर्ध्वं दृष्टिर्बाहवश्च एकाग्रं च मनोऽभवत्एकपादस्थिताः सम्यक्काष्ठभूताः समाहिताः

ūrdhvaṃ dṛṣṭirbāhavaśca ekāgraṃ ca mano'bhavatekapādasthitāḥ samyakkāṣṭhabhūtāḥ samāhitāḥ

Our plain-language meaning of this verse is waiting for scholar review.