2 Timothy 1:13,14
Hold fast the form of sound words, which you have heard of me, in faith and love which is in Christ Jesus.
Torrey's Topical Textbook—AKJV

Titus 1:9
Holding fast the faithful word as he has been taught, that he may be able by sound doctrine both to exhort and to convince the disputers.
Torrey's Topical Textbook—AKJV