G3874–παράκλησις–paraklēsis

He added an oath, in order that, through two unchangeable things, in which it is impossible for Him to prove false, we may possess mighty encouragement--we who, for safety, have hastened to lay hold of the hope set before us.

παράκλησιν paraklēsin “encouragement”

and you have quite forgotten the encouraging words which are addressed to you as sons, and which say, "My son, do not think lightly of the Lord's discipline, and do not faint when He corrects you;

παρακλήσεως paraklēseōs “exhortation”

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

παρακλήσεως· paraklēseōs “of exhortation;”