Agnipurana 170.5

170.5

ahorātramupāsītannaśaucaṃ bāndhavaiḥ saha /
nivartayeraṃstasmāttu jyeṣṭhāṃśambhāṣaṇādike //

They should observe ritual impurity for a day and a night along with their kinsmen. / Moreover, they should exclude him from the eldest son's share, conversation, and the like;