Śrāddha-kalpa: Dāna-phala, Medhya/Amedhya Dravya, and Uparāga
Eclipse) Observances (श्राद्धकल्पः—दानफल-मेध्यामेध्य-उपरागविधिः
नक्तं तु वर्जयेच्छ्राद्धं राहोरन्यत्र दर्शनात् / सर्वस्वेनापि कर्त्तव्यङ्क्षिप्रं वै राहुदर्शने
naktaṃ tu varjayecchrāddhaṃ rāhoranyatra darśanāt / sarvasvenāpi karttavyaṅkṣipraṃ vai rāhudarśane
One should avoid performing śrāddha at night, except upon the sighting of Rāhu. But when Rāhu is seen, śrāddha should indeed be done swiftly, even with one’s entire means.