'Perfect' in the Bible

Only let endurance have perfect results so that you may become perfect and complete, deficient in nothing.

Every gift which is good, and every perfect boon, is from above, and comes down from the Father, who is the source of all Light. In Him there is no variation nor the slightest suggestion of change.

But he who looks closely into the perfect Law--the Law of freedom--and continues looking, he, being not a hearer who forgets, but an obedient doer, will as the result of his obedience be blessed.