Skandapurana 5.223.8

5.223.8

apasavyaṃ tataḥ kṛtvā darbhāṃstilasamanvitān ..
dviguṇānprakṣipedbhūmau pitṝnuddiśya cātmanaḥ .. 8 ..

Then, having worn the sacred cord over the right shoulder, / he should throw double-folded darbha grass accompanied by sesame seeds onto the ground, intending it for his ancestors.