¹² For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart

¹⁶ And he had in his right hand seven stars: and out of his mouth went a sharp twoedged sword: and his countenance was as the sun shineth in his strength.

I was reading and searching through my Bible and I came across the two-edged sword? Now I’m familiar with the sword. It’s God’s word. But here is the real question. In Hebrews 4:12 it says, For the word of God is quick, and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart. Then in Revelation 1:16 it says, And he had in his right hand seven stars: and out of his mouth went a sharp two-edged sword: and his countenance was as the sun shineth in his strength.

So why in Hebrews does it refer to Gods word as sharper than any twoedged sword and in Revelation it just says sharp twoedged sword?

Your question:  “why in Hebrews does it refer to God’s word as sharper than any twoedged sword and in Revelation it just says sharp twoedged sword?” shows you are reading closely.  Good observation.

I think however, it is just a matter of emphasis.  Since the point in Hebrews 4 is how finely God’s Word divides, it emphasizes how sharp God’s Word is.  In Revelation 1 and 19, at the coming of the Lord Jesus Christ in judgment he is battling with a sword that cuts both ways; a very powerful weapon in warfare.  It also is sharp.  It too is the Word of God.  Revelation says it is sharp, but does not say how sharp.  Since we know that it too is the Word of God, then with the added information from Hebrews 4 we know it is sharper than any twoedged sword.  That is the value of cross referencing verses. Thanks for asking.