Valmiki Ramayana 1.15.31
मानुषे चिन्तयामास जन्मभूमिम् अथ आत्मनः ।ततः पद्म पलाशाक्षः कृत्वा आत्मानम् चतुर्विधम्॥
mānuṣe cintayāmāsa janmabhūmim atha ātmanaḥ |tataḥ padma palāśākṣaḥ kṛtvā ātmānam caturvidham ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book