vakyena
vākyena — words;
BG 3.2
guru-vākyena — by the order of his spiritual master;
SB 9.8.5-6
vākyena — through the words;
SB 10.66.19
vākyena — by words;
SB 11.26.16
vipra-vākyena — by the words of the brāhmaṇa;
SB 12.5.10