Shiva Purana
ततो ऽप्यादाय मूलेन मुद्रया शास्त्रदृष्टया ॥ योजयेन्मनसाचार्यो युगपत्सर्वयोनिषु ॥ १० ॥
Then he took the root of the tree and sealed it according to the scriptures. The teacher should apply the mind to all the wombs simultaneously.
english translation
tato 'pyAdAya mUlena mudrayA zAstradRSTayA ॥ yojayenmanasAcAryo yugapatsarvayoniSu ॥ 10 ॥
hk transliteration by Sanscript