Manava Dharmashastra 3.65

3.65

yaduktaṃ pañcasu mahāyajñeṣvekaikasminpṛthagadhikāro na samudāya eko'dhikāra, iti tadanena prakaṭīkaroti |
yadā dāridryādidoṣādnyato vā kāraṇātkathaṃcidaṃsaṃpattau nātithyādipūjā ghaṭeta tataḥ svādhyāye nityayuktena bhavitavyam | daive karmaṇi | vaiśvadevadevatābhyo'gnau homo 'daivaṃ karma' | bhūtayajñapitṛyajñayoḥ satyapi 'daivatve', prakaraṇādganāveva homo 'daiva'mucyate |
atra arthavādamāha | daive karmaṇi yuktaḥ tatparo | bibharti dhārayati | carācaraṃ sthāvaraṃ jaṅgamaṃ ca | sarvasya jagataḥ sthiterheturbhavatītyarthaḥ |
kathaṃ punaragnyāhutyā sarvasya jagataḥ sthitirbhavatītyata āha |

Medhātithi’s commentary (manubhāṣya):
It has been said above that the occasion for each of the Five Sacrifices is distinct, and all of them do not form an aggregate; this same idea is made clear by this verse.

When, by reason of poverty or some other cause, the necessary supplies being not available, the honouring of guests and such other acts be not possible, then one should be constantly engaged in Vedic Study.

‘In acts in honour of the gods’—the offering made in fire to the Vaiśvadeva gods are ‘acts done in honour of the gods.’ Though the ‘sacrifice to elementals’ and ‘sacrifice to Pitṛs’ are all ‘in honour of gods,’ yet from the context it is clear that it is the offering in fire that is meant by the term ‘acts done in honour of gods.’

A commendatory exaggeration is added—‘He who is engaged in’—i.e., busy with—‘acts in honour of the gods, upholds’—i.e., supports—‘the moveable and immoveable;’—i.e., he becomes the means of sustenance of the entire world.—(75)