Al-A'raf 7:8

Walwaznu yawma-ithini alhaqqufaman thaqulat mawazeenuhu faola-ika humu almuflihoon

And the weighing [of deeds] that Day will be the truth. So those whose scales are heavy - it is they who will be the successful.

The Weighing (of deeds) on that day is definite. As for those whose scales are heavy, they will be the successful ones.