In case you forgot

And now he stood alone, for the few that followed him had fled. But in that moment Glaurung issued from the gaping doors, and lay behind, between Turin and the bridge. Then suddenly he spoke, by the evil spirit that was in him, saying: “Hail, son of Hurin. Well met!”

Then Turin sprang about, and strode against him, and the edges of Gurthang shone as with flame; but Glaurung withheld his blast, and opened wide his serpent-eyes and gazed upon Turin. Without fear Turin looked into them as he raised up the sword; and straightaway he fell under the binding spell of the lidless eyes of the dragon, as he was halted moveless. The for a long time he stood as one graven of stone; and they two were alone, silent before the doors of Nargothrond.

But Glaurung spone again, taunting Turin, and he said: “Evil have been all thy ways, son of Hurin. Thankless, fosterling, outlaw, slayer of thy friend, thief of love, usurper of Nargothrond, captain foolhardy, and deserter of thy kin. As thralls thy mother and thy sister live in Dor-lomin, in misery and want. Thou art arrayed as a prince, but they go in rags; and for thee they yearn, but thou carest not for that. Glad may thy father be to learn that he hath such a son; as learn he shall.”

And Turin being under the spell of Glaurung hearkened to his words, and he saw himself as in a mirror misshappen by malice, and loathed that which he saw.

Silmarillion, p. 257