Agniveshyagrihyasutra 3.8.2.41

3.8.2.41

dakṣiṇataḥ samūlaṃ barhirupadadhāti idaṃ pitṛbhyaḥ prabharema barhirdevebhyo jīvanta uttaraṃ bharema \

To the south he places sacrificial grass with its roots intact: 'This sacrificial grass let us offer to the Fathers; to the gods let us, the living, bring a higher one.