Patisambhidamagga, Nibbana-dhatu:
"There are two types of relinquishment through cessation: relinquishment as giving up, and relinquishment as entering into. It gives up defilements and aggregates, thus it is relinquishment as giving up; cognizance enters cessation which is the nibbana principle thus it is relinquishment as entering into. These are the two kinds of relinquishment through cessation."
Nirodhavasena dve vossaggaa: pariccaagavossaggo ca, pakkhandanavossaggo ca. Kilesa ca khandhe ca pariccajatiiti, pariccaagavossaggo; nirodhanibbaanadhaatuyaa cittam pakkhandatiiti. Pakkhandanavossaggo nirodhavasena ime dve vossaggaa.
This, bhikkhu, is a designation for the element of Nibbāna: the removal of lust, the removal of hatred, the removal of delusion. The destruction of the taints is spoken of in that way.
https://suttacentral.net/sn45.7/en/bodhi
we enter upon and abide in the cessation of perception and feeling. And our taints are destroyed by our seeing with wisdom.
https://suttacentral.net/mn31/en/bodhi
"When a monk has emerged from the cessation of perception & feeling, to what does his mind lean, to what does it tend, to what does it incline?"
"When a monk has emerged from the cessation of perception & feeling, his mind leans to seclusion, tends to seclusion, inclines to seclusion."
https://www.accesstoinsight.org/tipitaka/sn/sn41/sn41.006.than.html#fn-4
According to the commentary, "seclusion" here stands for Nibbana.