You don't give in any thing to Nibbana but you realise Nibbana.
Once you realise Nibbana you release from gross factors to subtle factors gradually and develop Bodhiakkhiyadharma.
https://en.wikipedia.org/wiki/Bodhipakkhiy%C4%81dhamm%C4%81
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Then Ven. Sariputta went to the Blessed One and, on arrival, bowed down to him and sat to one side. As he was sitting there, the Blessed One said to him, "Sariputta, how many are the strengths of a monk whose effluents are ended, endowed with which he affirms the ending of the effluents (thus): 'The effluents are ended in me'?"
"Eight, lord, are the strengths of a monk whose effluents are ended, endowed with which he affirms the ending of the effluents (thus): 'The effluents are ended in me.' Which eight?
http://www.accesstoinsight.org/tipitaka/an/an08/an08.028.than.html