John Gill Commentary Hebrews 13:25

"Grace be with you all. Amen." — Hebrews 13:25 (ASV)

Grace be with you all, Amen .
] Which is the apostle's usual salutation in all his epistles, (2 Thessalonians 3:17 2 Thessalonians 3:18) in which he wishes renewed discoveries of the love and favour of God; fresh communications of grace from Christ; an abundant supply of the spirit of grace; an increase of internal grace and external gifts; and a continuance of the Gospel of the grace of God. Of "Amen", (See Gill on Hebrews 13:21). The subscription of this epistle is,

written to the Hebrews from Italy by Timothy ;
in the Alexandrian copy it is, "written to the Hebrews from Rome"; which is very probable, since the Italian brethren send their salutations in it; and the words, "by Timothy", are left out; nor is it likely that it should, since it is clear, from (Hebrews 13:23) that he was absent from the apostle; and if he had sent it by him, what need was there to inform them that he was set at liberty?