yad gāyatre adhi gāyatram āhitaṃ traiṣṭubhaṃ vā traiṣṭubhān niratakṣata yad vā jagaj jagaty āhitaṃ padaṃ ya it tad vidus te amṛtatvam ānaśuḥ
Mystic
That the gāyatrī́-verse is set (ā-dhā) in the gāyatrī́-verse, or that they fashioned the triṣṭúbh-verse out of the triṣṭúbh-verse, or that the jágatī step is set in the jágatī (jágat)—whoever know that, they have attained immortality.