John 8:31 KJV

Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed;
John 8:31, King James Version

In context

30 As he spake these words, many believed on him.

31 Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed;

32 And ye shall know the truth, and the truth shall make you free.

2 John 1:9 Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.
John 15:4 Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me.
2 Timothy 3:14 But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned them;
1 Timothy 4:16 Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.
James 1:25 But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.