sastraih

sva-śastraiḥ by His own weapons; SB 3.3.4
śastraiḥ with weapons; SB 4.5.23
śastraiḥ with weapons; SB 6.10.23
śastraiḥ by regular weapons; SB 8.10.4
śastraiḥ with weapons; SB 8.10.13-15
śāstraiḥ by the scriptures; CC Adi 3.87