BhG 17.24

syntax

tasmāt (therefore) om iti (OM) udāhṛtya (after declaring),
brahma-vādinām (of those discussing Brahman) vidhānoktāḥ (said in the precepts) yajña-dāna-tapaḥ-kriyāḥ (acts of sacrifice, charity and austerity) satatam (always) pravartante (they begin).

grammar

tasmāt	–	av. – therefore (from: tat sn. 5n.1 m. – from that);
om	–	av. – OM (from: om – yes, sacred syllable OM, praṇava);
iti	–	av. – thus (used to close the quotation);
udāhṛtya	–	ud-ā-√hṛ (to set up, to declare) absol. – after declaring;
yajña-dāna-tapaḥ-kriyāḥ	–	yajña-dāna-tapaḥ-kriya 1n.3 m.; DV / TP: yajñānāṁ ca dānānāṁ ca tapasāṁ ca kriyā iti – acts of sacrifice, charity and austerity (from: √yaj – to consecrate, to sacrifice, to worship, yajña – sacrifice, worship, name of Viṣṇu; √dā – to give, dāna – gift, charity; √tap – to scorch, tapas – heat, austerity; √kṛ – to do, kriyā – act, work, especially religious one);
pravartante	–	pra-√vṛt (to start to act, to surpass) Praes. Ā 1v.3 – they start to act, they act;
vidhānoktāḥ	–	vidhāna-ukta 1n.3 n.; TP: vidhānenoktā iti – said in the precepts (from: vi-√dhā – to put, to arrange, to give, vidhāna – order, regulation, method; √vac – to speak, PP ukta – spoken, called);
satatam	–	av. – constantly (from: sa-tata – constant, uninterrupted);
brahma-vādinām	–	brahma-vādin 6n.3 m.; TP: brahmanaṁ vādināṁ – of those who explain Brahman (from: √bṛh – to increase, brahman – spirit, the Vedas; √vad – to speak, vāda – speech, dispute, doctrine; -in, -min, -vin – sufixes meaning one who possesses; vādin – who speaks, who explains, who discusses);

textual variants

The second pada of verse 17.24 is the same as the third pada of verse BhG 18.3 and the first pada of verse BhG 18.5;

Śāṃkara

tasmāt om ity udāhṛtya uccārya yajña-dāna-tapaḥ-kriyā yajñādi-svarūpāḥ kriyāḥ pravartante vidhānoktāḥ śāstra-coditāḥ satataṃ sarvadā brahma-vādināṃ brahma-vadana-śīlānām

Rāmānuja

trayāṇām oṃ tat sad iti śabdānām anvayaprakāro varṇyate; prathamam om iti śabdasyānvayaprakāram āha
tasmād brahmavādinām vedādināṃ traivarṇikānāṃ yajñadānatapaḥkriyāḥ vidhānoktāḥ vedavidhānoktāḥ ādau om ity udāhṛtya satataṃ sarvadā pravartante / vedāś ca om ity udāhṛtyārabhyante / evaṃ vedānāṃ vaidikānāṃ ca yajñādīnāṃ karmaṇām om iti śabdānvayo varṇitaḥ / om itiśabdānvitavedadhāraṇāt tadanvitayajñādikarmakaraṇāc ca brāhmaṇaśabdanirdiṣṭānāṃ traivarṇikānām api om iti śabdānvayo varṇitaḥ

Śrīdhara

idānīṃ pratyekam oṅkārādīnāṃ prāśastyaṃ darśayiṣyann oṅkārasya tad evāha tasmād iti | yasmād evaṃ brahmaṇo nirdeśaḥ praśastas tasmād om ity udāhṛtya uccārya kṛtā veda-vādināṃ yajñādyāḥ śāstroktāḥ kriyāḥ satataṃ sarvadā aṅga-vaikalye ‚pi prakarṣeṇa vartante | saguṇā bhavantīty arthaḥ

Madhusūdana

idānīm a-kāra-u-kāra-ma-kāra-vyākhyānena tat-samudāyoṃkāra-vyākhyānavad oṃkāra-tac-chabda-sac-chabda-vyākhyānena tat-samudāya-rūpaṃ brahmaṇo nirdeśaṃ stuty-atiśayāya vyākhyātum ārabhate caturbhiḥ | tatra prathamam oṃkāraṃ vyācaṣṭe tasmād iti | yasmād om iti brahma ity ādiṣu śrutiṣv om iti brahmaṇo nāma prasiddhaṃ tasmād om ity udāhṛtyoṃkāroccāraṇānantaraṃ vidhānoktā vidhi-śāstra-bodhitā brahma-vādināṃ veda-vādināṃ yajña-dāna-tapaḥ-kriyāḥ satataṃ pravartante prakṛṣṭatayā vaiguṇya-rāhityena vartante | yasyaikāvayavoccāraṇād apy avaiguṇyaṃ kiṃ punas tasya sarvasyoccāraṇād iti stuty-atiśayaḥ

Viśvanātha

tad evaṃ tapo-yajñādīnāṃ traividhyaṃ sāmānyato manuṣya-mātram adhikṛtyoktam | tatra ye sāttvikeṣv api madhye brahma-vādinas teṣāṃ tu brahma-nirdeśa-pūrvakā eva yajñādayo bhavantīty āha oṃ tat sad ity evaṃ brahmaṇo nirdeśo nāmnā vyapadeśaḥ smṛtaḥ | śiṣṭair deśitaḥ | tatra om iti sarva-śrutiṣu prasiddham eva brahmaṇo nāma | jagat-kāraṇatvenātiprasiddher atan-nirasanena ca prasiddhes tad iti ca | sad eva saumyedam agra āsīt iti śruteḥ sad iti ca | yasmāt oṃ tat sat śabda-vācyena brahmaṇaiva brāhmaṇā vedā yajñāś ca vihitāḥ kṛtās tasmāt om iti brahmaṇo nāmodāhṛtyoccārya vartamānānāṃ brahma-vādināṃ yajñādayaḥ pravartante

Baladeva

yasmād evaṃ tasmād om iti nirdeśam udāhṛtyoccāryānuṣṭhitā brahma-vādināṃ sāttvikānāṃ trai-varṇikānāṃ yajñādyāḥ kriyāḥ pravartante | aṅga-vaikalye ‚pi sāṅgatāṃ bhajantīti