Hebrews 2:1 Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.

Romans 6:17 But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.

Romans 16:17 Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.

Philippians 3:16 Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing.

2 Timothy 1:13 Hold fast the form of sound words, which thou hast heard of me, in faith and love which is in Christ Jesus.

1 Timothy 6:20 O Timothy, keep that which is committed to thy trust, avoiding profane and vain babblings, and oppositions of science falsely so called:

Revelation 2:5 Remember therefore from whence thou art fallen, and repent, and do the first works; or else I will come unto thee quickly, and will remove thy candlestick out of his place, except thou repent.

Revelation 2:16 Repent; or else I will come unto thee quickly, and will fight against them with the sword of my mouth.

Revelation 2:25 But that which ye have already hold fast till I come.

Revelation 3:11 Behold, I come quickly: hold that fast which thou hast, that no man take thy crown.

Revelation 3:19 As many as I love, I rebuke and chasten: be zealous therefore, and repent.

2 Peter 3:10 But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.

Revelation 16:15 Behold, I come as a thief. Blessed is he that watcheth, and keepeth his garments, lest he walk naked, and they see his shame.

1 Thessalonians 5:2 For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.

1 Thessalonians 5:6 Therefore let us not sleep, as do others; but let us watch and be sober.

Matthew 24:42 ¶Watch therefore: for ye know not what hour your Lord doth come.

Matthew 24:43 But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up.

Luke 12:39 And this know, that if the goodman of the house had known what hour the thief would come, he would have watched, and not have suffered his house to be broken through.

Luke 12:40 Be ye therefore ready also: for the Son of man cometh at an hour when ye think not.