अग्निनिचयः (Agninichaya) / The Accumulation of Sacred Fire & the Classification of Pitṛs by Time-Order
गायत्री चैव त्रिष्टुप्च जगती चैव याः स्मृताः / त्र्यंबका नामतः प्रेम्णा योनयस्ता वनस्पतेः
gāyatrī caiva triṣṭupca jagatī caiva yāḥ smṛtāḥ / tryaṃbakā nāmataḥ premṇā yonayastā vanaspateḥ
Gāyatrī, Triṣṭup, and Jagatī—the metres remembered in tradition—are lovingly called by name “Tryambakā”; they are the wombs (sources) of the Lord of plants.