PHB, page 291. Available in the SRD.

Petrified

Condition

• A petrified creature is transformed, along with any nonmagical object it is wearing or carrying, into a solid inanimate substance (usually stone). Its weight increases by a factor of ten, and it ceases aging.

• The creature is Incapacitated, can't move or speak, and is unaware of its surroundings.

• Attack rolls against the creature have advantage.

• The creature automatically fails Strength and Dexterity saving throws.

• The creature has resistance to all damage.

• The creature is immune to poison and disease, although a poison or disease already in its system is suspended, not neutralized.