The Utterly Unborn State! This, unquestionably - so has there been heard by me - was so stated by the Lord, was stated by the worthy Arahant:
There exists indeed, monks, that which is unborn, is unbecome, is uncreated, that which is uncaused and unconditioned… For if there were not, monks, that which is unborn, is unbecome, is uncreated, that which is uncaused and unconditioned… there could not be made known right here the absolute escape from that which is born, from that which is become, from that which is created, from that which is conditioned. However since there indeed exists, monks, that sublime state which is unborn, which is unbecome, which is uncreated, & unconditioned, there is therefore right now made known the complete escape from that, which is born, from that, which is become, from that, which is created, from that, which is conditioned. So said the Lord Buddha while adding: That which is born, that which is become, that which is co-arisen, that which is conditioned, that which is created, that which is unstable, that which is the bridge between birth and death this seat of disease, with nutriment as its source, is only perishable… It is nothing in which to rejoice! The escape from this is stilled calm, beyond the sphere of logic, being that which is stable sameness, that which is unborn, that which is independent, not co-arisen, grief-free, dustless, this state is the ceasing of conditions involving suffering, it is the pacification of all formation! It is Peace. It is the highest Bliss… this matter, too, was stated by the lord, so has there been heard by me.
Source:The Itivuttaka - Spoken by Buddha.The Unborn Sutta 43