Bhashya
डपसद्व्रती भूत्वा पयोव्रती सन्नित्यर्थः औदुम्बरे उदुम्बरवृ-क्षमये, कंसे चमसे वा, तस्यैव विशेषणम्- कंसाकारे चम-साकरे वा औदुम्बर एव ; आकारे तु विकल्पः, न औदुम्बरत्वे ।अत्र सर्वौषधं सर्वासामोषधीनां समूहं यथासंभवं यथाशक्तिच सर्वां ओषधीः समाहृत्य ; तत्र ग्राम्याणां तु दश निय-मेन ग्राह्या व्रीहियवाद्या वक्ष्यमाणाः ; अधिकग्रहणे तु नदोषः ; ग्राम्याणां फलानि च यथासंभवं यथाशक्ति च ;इतिशब्दः समस्तसंभारोपचयप्रदर्शनार्थः, अन्यदपि यत्सं-भरणीयं तत्सर्वं संभृत्येत्यर्थः ; क्रमस्तत्र गृह्योक्तो द्रष्ट-व्यः ।परिसमूहनपरिलेपने भूमिसंस्कारः ।अग्निमुपस-माधायेति वचनात् आवसथ्येऽग्नाविति गम्यते, एकवच्च-नात् उपसमाधानश्रवणाच्च ; विद्यमानस्यैव उपसमाधानम् ;परिस्तीर्य दर्भान् ; आवृता- स्मार्तत्वात्कर्मणः स्थालीपाका-वृत् परिगृह्यते- तया आज्यं संस्कृत्य ; पुंसा नक्षत्रेण पुंना-म्ना नक्षत्रेण पुण्याहसंयुक्तेन, मन्थं सर्वौषधफलपिष्टं तत्रौदु-म्बरे चमसे दधनि मधुनि घृते च उपसिच्य एकया उप-मन्थन्या उपसंमथ्य, संनीय मध्ये संस्थाप्य, औदुम्बरेणस्रुवेण आवापस्थाने आज्यस्य जुहोति एतैर्मन्त्रैः 'यावन्तोदेवाः' इत्यादिः ॥
In plain words
Once he has kept the upasad-vow — meaning, lived on milk alone — that phrase is explained. The vessel itself must be udumbara wood, shaped either like a kaṃsa or a camasa; the choice is only ever in the shape, never in the wood. 'All herbs' means exactly that: gather every herb you can find, and as many as you're able to. Among the ordinary cultivated grains, though, ten are non-negotiable — rice, barley, and the rest already named — though there's no harm in bringing more. Gather the fruits of those same plants the same way, as far as you can and as much as you can. That closing 'and so on' simply means: whatever else belongs in this collection, gather that too. For the order of steps, look to the household ritual manual. Preparing the ground just means clearing it and smearing it. When the text says he tends the fire, it means the household fire already burning — you can tell from the singular, and from the very word used, which only applies to a fire already alight, never one being lit fresh. Spread the sacred grass. Since this rite rests on remembered tradition rather than revealed scripture, it simply borrows its procedure from the familiar cooking-pot offering, and prepares the ghee the same way. Under a lunar mansion with a masculine name, on a day judged auspicious, he pours the ground mixture of every herb and fruit into the udumbara cup, into curd, honey, and ghee, stirs it with one udumbara stick, gathers it into the center, and with the udumbara ladle offers the ghee at the proper point — reciting the mantras that begin, 'as many as are the gods...'
Close to the Sanskrit
Having become one committed to the upasad-vow, that is, being one whose vow is confined to milk — that is the meaning. [The vessel is] made of udumbara wood, whether a kaṃsa or a camasa; or else this is a qualifier of that very word: whether in the shape of a kaṃsa or in the shape of a camasa, it is made of udumbara wood alone; the option lies only in the shape, not in the material being udumbara. Here, 'all herbs' means having gathered together, as far as possible and to the extent of one's ability, a collection of all the herbs. Among the cultivated ones, however, ten must be taken by rule — rice, barley, and so on, as will be stated; there is no fault in taking more. And also the fruits of the cultivated plants, as far as possible and to the extent of one's ability. The word 'iti' serves to show the accumulation of the entire mass of materials; the meaning is that whatever else needs to be gathered, all of it should be gathered. The sequence there should be understood as stated in the Gṛhya-sūtra. Preparing the ground means clearing it and smearing it. From the statement 'having tended the fire,' it is understood that the āvasathya fire is meant, because of the singular number and because the word 'tending' is used — tending applies only to a fire that already exists. Having spread the darbha grass around — 'the recurring procedure': since this rite is smārta, the procedure of the sthālīpāka offering is adopted for it — having consecrated the ghee by that procedure. With a masculine-named lunar asterism, joined with an auspicious day — having poured the mantha, ground from all the herbs and fruits, there into the udumbara cup, into curd, honey, and ghee, having churned it with one stirring-stick, having gathered it and set it in the middle, with the udumbara ladle, at the place of pouring the ghee, he offers with these mantras beginning 'as many as are the gods.'