Śatapatha Brāhmaṇa ("of a hundred paths") 13.8.4.3

13.8.4.3

aśmanastrīṃstrīnprakiranti tā abhyuttarantyaśmanvatī rīyate saṃrabhadhvamuttiṣṭhata pratarata sakhāyaḥ atrā jahīmo'śivā ye asañcivānvayamuttaremābhi vājāniti yathaiva yajustathā bandhuḥ

They throw three stones each (into the northern furrows), and pass over them, with (Vâg. S. XXXV, 10; Rig-v. X, 53, 8): 'Here floweth the stony one: hold on to each other, rise, and cross over, ye friends: here will we leave behind what unkind spirits there be, and will cross over to auspicious nourishments;'--as the text so its import.