Garudapurana 1.219.2

1.219.2

vṛddhiśrāddhaṃ pravakṣyāmi pūrvavattadviśeṣakam /
jātaputramukhadarśanādau vṛddhi śrāddhaṃ pūrvābhimukheṣu dakṣiṇopavītiṣu sayavabadarakuśairdevatīrthena namaskārāntena dakṣiṇopacāreṇa kartavyam //

I shall declare the vṛddhi-śrāddha, similar to the preceding with its specifics: / At the time of looking upon the face of a newborn son and other [auspicious occasions], the vṛddhi-śrāddha should be performed with the participants facing east, wearing the sacred thread over the left shoulder, using barley, jujube fruit, and kuśa-grass, with the rite for gods, ending in obeisance, and with the customary offerings made towards the south.