Mark 14:38

Watch ye and pray, that ye enter not into temptation; the spirit indeed is willing, but the flesh is weak.

Matthew 26:41

Watch and pray, that ye enter not into temptation. The spirit indeed is willing, but the flesh weak.

Matthew 24:42

Watch therefore: for ye know not at what hour your Master cometh.

Mark 14:34

and he saith to them, My soul is deeply afflicted even to death: abide here, and watch.

Luke 21:36

Watch therefore, praying at every proper opportunity, that ye may be accounted worthy to escape all these things which are ready to come to pass, and to stand before the Son of man.

Luke 22:40

And when he came to the spot, he said unto them, Pray that ye enter not into temptation.

Luke 22:46

And he said unto them, Why sleep ye? rise up, and pray, that ye enter not into temptation.

Romans 7:18-25

For I know that there dwelleth not in me (that is, in my flesh) any good thing: for to will is present with me; but how to perform that which is good I find not.

Revelation 3:2-3

Be vigilant and strengthen the things which remain, which are ready to die; for I have not found thy works complete before God.

Matthew 6:13

And lead us not into temptation; but deliver us from evil: for thine is the kingdom, and the power, and the glory, for ever and ever. Amen!

Matthew 25:13

Watch therefore, for ye know not the day nor the hour in which the Son of man cometh.

1 Corinthians 16:13

Watch ye, stand fast in the faith, be manful, be strong.

Galatians 5:17

For the flesh hath appetites contrary to the Spirit, and the Spirit contrary to the flesh, and these act in opposition the one to the other: so that ye do not the things which ye would.

Philippians 2:12

Wherefore, my beloved, as ye have always been obedient, not only during my presence with you, but now much more in my absence, with fear and trembling work out your own salvation.

1 Peter 5:8

Be sober, be vigilant; for your adversary the devil, as a roaring lion, prowleth around, seeking whom he may devour:

Revelation 3:10

Because thou hast keep the word of my patience, I also will preserve thee from the hour of temptation, which is coming upon the whole habitable globe to try the dwellers upon earth.

Treasury of Scripture Knowledge

Summary

Watch ye and pray, lest ye enter into temptation. The spirit truly is ready, but the flesh is weak.

General references

Bible References

The spirit

Romans 7:18
For I know that there dwelleth not in me (that is, in my flesh) any good thing: for to will is present with me; but how to perform that which is good I find not.
Galatians 5:17
For the flesh hath appetites contrary to the Spirit, and the Spirit contrary to the flesh, and these act in opposition the one to the other: so that ye do not the things which ye would.
Philippians 2:12
Wherefore, my beloved, as ye have always been obedient, not only during my presence with you, but now much more in my absence, with fear and trembling work out your own salvation.

General references

Mark 13:33
Take ye heed, watch, and pray; for ye know not when the time is.