Even if the necessary reagents were listed here, you couldn't craft the daggers without a recipe.
The recipe for the Dagger of Absolution can be bought from Eudora Tangletree in Olde Towne. She's the NPC that gave you the quest, which you can see if you check your quest notes. Ms. Tangletree is halfway down the hill and on the left as you come in from the Shopping District.
You can access the recipe from your Crafting Menu (press the "J" key on your keyboard). The recipe will tell you how many of each reagent you need.
Some of the reagents can be bought from the the Reagent Vendor next to Ms. Tangletree. The others can be picked up on most streets that connect to Olde Towne, or you can buy them at the nearby Bazaar.
Remember that you need twice as many reagents as the recipe calls for, since you're crafting two daggers.