Aura of Purity

4th-Level Abjuration
Casting Time: 1 action
Range: Self (30-foot radius)
Components: V
Duration: (C) 10 minutes

As in the Player's Handbook except the following has also been added:
At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the radius of the spell increases by 10 feet per spell level above 4th.

Source: PHB 216