Valmiki Ramayana 7.46.20
योजयस्व रथं शीघ्रमद्य भागीरथीजलम् ।शिरसा धारयिष्यामि त्र्यम्बकः पर्वते यथा॥
yojayasva rathaṃ śīghramadya bhāgīrathījalam |śirasā dhārayiṣyāmi tryambakaḥ parvate yathā ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book