1 Peter 1:15,16 (KJV)
15 But as he which hath called you is holy, so be ye holy in all manner of conversation;
16 Because it is written, Be ye holy; for I am holy.
Hebrews 12:14 (KJV)
14 Follow peace with all men, and holiness, without which no man shall see the Lord:
1 Thessalonians 4:7 (KJV)
7 For God hath not called us unto uncleanness, but unto holiness.