होममण्डलसंस्कारादिPreparing the place of homa and the rest
Verse 124
ततः स्थण्डिलमध्ये तु हसौःगर्भं त्रिकोणकम् । षट्कोणं तद्बहिर्वृत्तं ततोऽष्टदलपङ्कजम् । भूपुरं तद्बहिर्विद्वान् विलिखेद्यन्त्रमुत्तमम् ॥ १२४ ॥
tataḥ sthaṇḍilamadhyē tu hasauḥgarbhaṁ trikōṇakam | ṣaṭkōṇaṁ tadbahirvṛttaṁ tatō’ṣṭadalapaṅkajam | bhūpuraṁ tadbahirvidvān vilikhēdyantramuttamam || 124 ||
Translation
Then in the middle of the altar the wise one should draw the excellent yantra: a triangle with hsauḥ inside, a hexagon, outside it a circle, then an eight-petalled lotus, and outside it the bhūpura.
Word by word
- tataḥ
- then
- sthaṇḍila
- altar
- madhyē
- in the middle
- tu
- and
- hasauḥ
- hsauḥ
- garbhaṁ
- inside
- trikōṇakam
- triangle
- ṣaṭkōṇaṁ
- hexagon
- tad
- (tat) its
- bahir
- (bahiḥ) outside
- vṛttaṁ
- circle
- tatō
- (tataḥ) then
- aṣṭa
- eight
- dala
- petals
- paṅkajam
- lotus
- bhūpuraṁ
- the earth-square
- vidvān
- the wise one
- vilikhēd
- (vilikhet) should draw
- yantram
- yantra
- uttamam
- excellent
Meaning
Hsauḥ is ha, sa and au with the visarga: the seed at the heart of the fire-altar.

Commentary
Hariharānanda Bhāratī’s Sanskrit commentary, translated
Then, after that, in the middle of the altar the wise one should draw this excellent yantra: a triangle in whose womb are ha, sa, au and the visarga joined, "hsauḥ"; outside it a six-cornered figure; outside that a circle; then outside it an eight-petalled lotus; and outside that again a four-cornered bhūpura with four doors.