What’s the casting time of a prayer of healing spell cast from a scroll?

@JeremyECrawford what's the casting time of a prayer of healing spell cast from a scroll. 10 min or 1 action?

— Aaron Sarver (@Sealab2015) October 24, 2016

The DMG errata clarifies that casting a spell from a spell scroll requires the spell's normal casting time: https://t.co/7cBE3UUIDe #DnD https://t.co/6V6JFb9XkC

— Jeremy Crawford (@JeremyECrawford) October 24, 2016