Volsunga Saga - Chapter 19
OF THE SLAYING OF REGIN, SON OF HRIEDMAR.
THEREAFTER came Regin to Sigurd, and said, "Hail, lord and master, a noble victory hast thou won in the slaying of Fafnir, whereas none durst heretofore abide in the path of him; and now shall this deed of fame be of renown while the world stands fast."
Then stood Regin staring on the earth a long while, and presently thereafter spake from heavy mood: "Mine own brother hast thou slain, and scarce may I be called sackless of the deed."
Then Sigurd took his sword Gram and dried it on the earth, and spake to Regin —
"Afar thou faredst when I wrought this deed and tried this sharp sword with the hand and the might of me; with all the might and main of a dragon must I strive, while thou wert laid alow in the heather-bush, wotting not if it were earth or heaven."
Said Regin, " Long might this worm have lain in his lair, if the sharp sword I forged with my hand had not been good at need to thee; had that not been, neither thou nor any man would have prevailed against him as at this time."
Sigurd answers, "Whenas men meet foes in fight better is stout heart than sharp sword."
 Then said Regin, exceeding heavily, "Thou hast slain my brother, and scarce may I be sackless of the deed."
Therewith Sigurd cut out the heart of the worm with the sword called Ridil; but Regin drank of Fafhir's blood, and spake, " Grant me a boon, and do a thing little for thee to do. Bear the heart to the fire, and roast it, and give me thereof to eat"
Then Sigurd went his ways and roasted it on a rod; and when the blood bubbled out he laid his finger thereon to essay it, if it were fully done; and then he set his finger in his mouth, and lo, when the heart-blood of the worm touched his tongue, straightway he knew the voice of all fowls, and heard withal how the wood- peckers chattered in the brake beside him —
"There sittest thou, Sigurd, roasting Fafhir's heart for another, that thou shouldest eat thine ownself, and then thou shouldest become the wisest of all men."
And another spake: "There lies Regin, minded to beguile the man who trusts in him."
But yet again said the third, "Let him smite the head from off him then, and be only lord of all that gold."
And once more the fourth spake and said, "Ah, the wiser were he if he followed after that good counsel, and rode thereafter to Fafhir's lair, and took to him that mighty treasure that lieth there, and then rode over Hindfell, whereas sleeps Brynhild; for there would he get great wisdom. Ah, wise he were, if he did after your redes, and bethought him of his own weal; for where wolf's ears are, wolf's teeth are near."
Then cried the fifth: "Yea, yea, not so wise is he as  I deem him, if he spareth him, whose brother he hath slain already."
At last spake the sixth: "Handy and good rede to slay him, and be lord of the treasure!"
Then said Sigurd, "The time is unborn wherein Regin shall be my bane; nay, rather one road shall both these brothers fare."
And therewith he drew his sword Gram and struck off Regin's head.
Then heard Sigurd the woodpeckers a-singing, even as the song says.
For the first sang:
Bind thou, Sigurd,
Green go the ways
 And the third:
A high hall is there,
Soft on the fell
Go, son, behold