Novice Slow Rune is a weapon rune in Dragon Age: Origins.
Dragon Age: Origins
Found in a chest when first meeting Alistair at Ostagar.
Dragon Age: Origins - Awakening
Ambassador Cera is selling unlimited quantities of this rune at the throne room of Vigil's Keep for 88 0.
Sandal is selling unlimited quantities of this rune in the Apprentice Quarters of the Circle Tower in Witch Hunt DLC for 92 0.