Libram of Divinity

Libram of Divinity is a rare relic for paladins that previously (pre-Patch 4.0.1) increased the healing effects of Flash of Light by up to 53.

Source
This item drops from Doctor Theolen Krastinov, Instructor Malicia, Lady Illucia Barov, Lord Alexei Barov, Lorekeeper Polkelt and The Ravenian in Scholomance.