Bhagavad Gita Chapter 9 Verse 17
भगवद् गीता अध्याय 9 श्लोक 17

पिताऽहमस्य जगतो माता धाता पितामहः।
वेद्यं पवित्रमोंकार ऋक् साम यजुरेव च।।9.17।।



English Translation - Swami Sivananda
9.17 I am the father of this world, the mother, the dispenser of the fruits of actions and the 
grandfather; the (one) thing to be known, the purifier, the sacred monosyllable (Om), and also the Rik-, the Sama-and the Yajur-Vedas.


English Translation of Sanskrit Commentary By Sri Shankaracharya's
9.17 Asya, of this; jagatah, world; aham, I; am pita, the father; mata, the mother; dhata, ordainer, dispenser of the results of their actions to the creatures; (and the) pirtamahah, grand-father. I am the vedayam, knowable-that which has to be known; the pavitram, sanctifier; [Virtuous actions.] and the onkarah, syllable Om; eva ca, as also Rk, Sama and Yajus. [Brahman, which has to be known, is realizable through Om, regarding which fact the three Vedas are the authority. The ca (as also) is suggestive of the Atharva-veda.]
Moreover,


Transliteration Bhagavad Gita 9.17Pitaahamasya jagato maataa dhaataa pitaamahah;
Vedyam pavitramonkaara riksaama yajureva cha.


Word Meanings Bhagavad Gita 9.17aham—I; kratuḥ—Vedic ritual; aham—I; yajñaḥ—sacrifice; svadhā—oblation; aham—I; aham—I; auṣhadham—medicinal herb; mantraḥ—Vedic mantra; aham—I; aham—I; eva—also; ājyam—clarified butter; aham—I; agniḥ—fire; aham—I; hutam—the act offering; pitā—Father; aham—I; asya—of this; jagataḥ—universe; mātā—Mother; dhātā—Sustainer; pitāmahaḥ—Grandsire; vedyam—the goal of knowledge; pavitram—the purifier; om-kāra—the sacred syllable Om; ṛik—the Rig Veda; sāma—the Sama Veda; yajuḥ—the Yajur Veda; eva—also; cha—and