The events leading up to Longchenpa's parinirvana are recorded in a text known as The Immaculate Radiance which includes these lines:
My delight in death is far, far greater than
The delight of traders at making vast fortunes at sea,
Or the lords of the gods who vaunt their victory in battle;
Or of those sages who have entered the rapture of perfect absorption.
So just as a traveller who sets out on the road when it is time,
I, Pema Ledrel Tsal, will not remain in this world any longer,
But will go to dwell in the stronghold of the great bliss of deathlessness.