'Two edged' in the Bible

The high songs of GOD be in their throat, and a two-edged sword in their hand:

But, the latter end of her, is bitter as wormwood, sharp, as a two-edged sword!

And, having in his right hand, seven stars, and, out of his mouth, a sharp, two-edged sword, going forth; and, his whole appearance, as when, the sun, shineth in its strength.

And, unto the messenger of the assembly, in Pergamum, write: - These things, saith he that hath the sharp, two-edged sword: