vrsaih
vṛṣaiḥ — on the backs of bulls; SB 8.10.10-12
kṛtrima-go-vṛṣaiḥ — by becoming artificial cows and bulls; SB 10.11.39-40
sva-vṛṣaiḥ — by their respective mates; SB 10.20.46
vṛṣaiḥ — with the bulls; SB 10.46.9-13
go-vṛṣaiḥ — by the bulls; SB 10.58.53
vṛṣaiḥ — and bulls; SB 10.86.27-29