Occurrences of upavāsa in "Śāṅkhāyanagṛhyasūtra"

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2.7.29ahaḥśeṣaṃ sthānam upavāsaś ca[+]
2.17.3nopavāsaḥ pravāse syāt patnī dhārayate vratam / putro bhrātāthavā patnī śiṣyo vāsya baliṃ haret[+]