Surya Siddhanta
स्नानदानजपश्राद्धव्रतहोमादिकर्मभिः। प्राप्यत सुमहच्छ्रेयस् तत्कालज्ञानतस् तथा॥
So, from a knowledge of the time of its occurrence, very great advantage is obtained, by means of bathing, giving, prayer, ancestral offerings, vows, oblations, and other like acts.
english translation