Manava Dharmashastra 6.10

6.10

darśeśceṣṭiśca āgrayaṇaṃ ceti samāhāradvandvaḥ | cāturmāsyaturāyaṇadākṣāyaṇāḥ śrautakarmaviśeṣavacanāḥ | nityā eva turāyaṇādayaḥ keṣāṃcit |

He shall perform the Darśeṣṭi and the Āgrayaṇa; as also the Cāturmāsya sacrifices, and the Turāyaṇa and Dākṣāyaṇa in due order.—(10).

Medhātithi’s commentary (manubhāṣya):
‘Darśeṣṭyāgrayaṇam is a copulative compound consisting of the two terms ‘darśeṣṭi’ and ‘āgrayaṇā’. ‘Caturmāsya’, ‘Turāyaṇa’ and ‘Dākṣayaṇa’ are the names of particular śrauta rites.

According to some people the performance of the Turāyaṇa and the rest is obligatory—(10).

This verse is quoted in Aparārka (p. 941), which explains ‘ṛkṣeṣṭi’ as the Nakṣatreṣṭi, the sacrifice to the lunar mansions,—and the Uttarāyaṇa and Dakṣiṇāyana as the two six-monthly sacrifices pertaining to the two solstices;—and in Parāśaramādhava (Ācāra, p. 528).