Tafsir of Al-Mu'minoon 23:114

قال إن لبثتم إﻻ قليﻼ

He will say: "You stayed not but a little...'' meaning, it was only a short time, no matter how you look at it.

لو أنكم كنتم تعلمون

if you had only known! means, you would not have preferred the transient to the eternal, and treated yourself in this bad way, and earned the wrath of Allah in this short period. If you had patiently obeyed Allah and worshipped Him as the believers did, you would have attained victory just as they did. Allah did not create His Servants in vain Allah tells: