"ओँ तत्सत्" मन्त्र माहात्म्यम्The greatness of the mantra oṁ tat sat
Verse 155
जपो होमः प्रतिष्ठा च संस्काराद्यखिलाः क्रियाः । ओँ तत्सन्मन्त्रनिष्पन्नाः सम्पूर्णाः स्युर्न संशयः ॥ १५५ ॥
japō hōmaḥ pratiṣṭhā ca saṁskārādyakhilāḥ kriyāḥ | ōm̐ tatsanmantraniṣpannāḥ sampūrṇāḥ syurna saṁśayaḥ || 155 ||
Translation
Japa, homa, installation, the sacraments and all rites, if accomplished with the mantra oṁ tat sat, will be complete, without doubt.
Word by word
- japō
- (japaḥ) japa
- hōmaḥ
- homa
- pratiṣṭhā
- installation
- ca
- and
- saṁskāra
- the sacraments
- ādi
- (ādi) and the rest
- akhilāḥ
- (akhilāḥ) all
- kriyāḥ
- rites
- ōm̐
- oṁ
- tat
- tat
- san
- (sat) sat
- mantra
- with the mantra
- niṣpannāḥ
- accomplished
- sampūrṇāḥ
- complete
- syur
- (syuḥ) will be
- na
- no
- saṁśayaḥ
- doubt
Meaning
After chapters of mantras for each act, one mantra is said to be enough for all of them. The text's scope for it is as wide as the ritual life it has taught.

Commentary
Hariharānanda Bhāratī’s Sanskrit commentary, translated
See the commentary on verse 154.