'Short' in the Bible

Therefore let us be on our guard lest perhaps, while He still leaves us a promise of being admitted to His rest, some one of you should be found to have fallen short of it.

For there is still but a short time and then "The coming One will come and will not delay.

Bear with me, brethren, when I thus exhort you; for, in fact, it is but a short letter that I have written to you.