Mahabharata — Anushasana Parva, Shloka 11
अत्रेः तपोबलप्रकाशः तथा च्यवनस्य सोमाधिकारः
Atri’s Illumination by Tapas; Cyavana and Soma-Entitlement
क्षेत्रप्रतिग्रहे चैव ग्रहसूतकयोस्तथा । त्रीणि रात्राण्युपोषित्वा तेन पापाद् विमुच्यते
kṣetrapratigrahe caiva grahasūtakayostathā | trīṇi rātrāṇyupoṣitvā tena pāpād vimucyate ||
毗湿摩说道：“若受取土地之赠——尤其在日月食之时，或处于苏塔迦（sūtaka，仪式不净期）之中——当以三夜断食为赎；由此行持，便能脱离因受取而生之罪。”此教诲表明：正法对交易之时机与清净极为谨慎，所设乃适度之忏罚，而非全然拒绝人间应尽之礼义。
भीष्य उवाच
Educational Q&A
Accepting gifts (especially land) at ritually sensitive times like an eclipse or during sūtaka can generate fault; a specific, limited penance—fasting for three nights—purifies the receiver and removes the resulting demerit.
In the Anuśāsana Parva’s dharma-instruction, Bhīṣma is teaching norms of conduct and expiation. Here he gives a practical rule: if one has accepted a land-gift under eclipse-time or impurity conditions, one should perform a three-night fast as atonement.