Manava Dharmashastra 5.87

5.87

ādeśa 'ādiṣṭam|' vratādeśanasambandhādrūḍhirūpeṇa brahmacāryucyate | tasya brahmacaryāśramasthasya sato ye sapiṇḍāḥ pramīyante teṣāmayādiṣyudakadānapratiṣedhaḥ | prākpramītānāṃ vihitamanvāhikaṃ kuryāddevapitṛtarpaṇamiti | ā vratasyeti ā samāvartanādityarthaḥ | na punarāntarālikasāhasikādityarthaḥ | vratacaraṇasamāpteḥ samāvṛttaḥ sa sarveṣāmekaikasyodakaṃ kṛtvaikasminnahani, trirātramāśaucaṃ kuryāt | mātustūdakadānaṃ bratino'pīṣyate | na ca vratalopaḥ | smṛtyantaramudāharanti | aparāyya ādiṣṭau nodaka iti |

The person under instruction shall not make water-offerings till the completion of his pupilage; at its completion, he becomes pure in three days, after having made the water-offerings.

Medhātithi’s commentary (manubhāṣya):
‘Ādiṣṭa’ means ‘ādeśa’, ‘instruction’; and the term ‘person under instruction’ denotes the Student, by reason of his connection with the instruction that he receives regarding his observances. The present text prohibits the making of water-offerings by one who is still in the state of the Student, to such Sapiṇḍa relations as may happen to die during that period. As for those that have died before, the offering of water to the forefathers and Gods has already been prescribed for the Student also.

‘Till the completion of his pupilage;—i.e. till the performance of the ‘Samāvartana’ ceremony; and it does not mean any forced completion of the stage in the interval.

On returning after having finished his observances, he shall make a water-offering to each of the dead relations on one day; and he should observe ‘impurity’ for three days.

As regards the making of water-offering to his mother, this is necessary for the Student also; and such an offering does not interfere with the proper fulfilment of his observances. In support of this they quote another Smṛti -text—viz. ‘The person undergoing instruction does not commit a wrong in making a water-offering.’—(87).