He (a brahmana) should offer oblations to the relatives of the forefathers during the mahalaya ceremonies in the month of Asvina
Expressions researched:
"he should offer oblations to the relatives of the forefathers during the mahalaya ceremonies in the month of Asvina"
Srimad-Bhagavatam
SB Canto 7
A brāhmaṇa who is sufficiently rich must offer oblations to the forefathers during the dark-moon fortnight in the latter part of the month of Bhādra. Similarly, he should offer oblations to the relatives of the forefathers during the mahālayā ceremonies in the month of Āśvina.
SB 7.14.19, Translation: A brāhmaṇa who is sufficiently rich must offer oblations to the forefathers during the dark-moon fortnight in the latter part of the month of Bhādra. Similarly, he should offer oblations to the relatives of the forefathers during the mahālayā ceremonies in the month of Āśvina.