The Law Code of Yājñavalkya 3.3.67

3.3.67

mahāprasthāne 'py aśaktau bhṛgupatanādikaṃ vā kuryāt, vānaprastho vīrādhvānaṃ jvalanāmbupraveśanaṃ bhṛgupatanaṃ vānutiṣṭhet iti smaraṇāt | snānācamanādidharmā brahmacāriprakaraṇādyabhihitāś cāvirodhino 'syāpi bhavanti, uttareṣāṃ caitadavirodhi (GDh 3.10) iti gautamasmaraṇāt | evaṃ prāguditaindavādidīkṣāmahāprasthānaparyantaṃ tanutyāgāntam anutiṣṭhan brahmaloke pūjyatāṃ prāpnoti | yathāha manuḥ |

If he is incapable even of the great departure, he may cast himself from a precipice or the like, according to the traditional text: “A forest hermit should undertake the heroic path, entering fire or water, or casting himself from a precipice.” The duties such as bathing and sipping water that were mentioned in the section on the student and other sections, and are not inconsistent, apply to him as well, according to Gautama's traditional text: “And to the subsequent [stages], whatever is not inconsistent with this” (GDh 3.10). Thus, performing [practices] from the lunar vow and other observances mentioned earlier up to the great departure ending in abandoning the body, he attains honor in the world of Brahmā. As Manu says: