Lord Krishna voice is heard through the Bhagavad Gita. Some important verses are included here Hope you make use of these precepts in your daily life.
4-1 Avatara 4(1 to 9,14) 4-2 Visvarupa 7(8 to 12), 9(15 to 19) 9(15 to 19.
Vibhuties of Isvara-Divine Glory 10(1 to7,12 to 42), 15(12 to 15)