Caitanya-caritāmṛta 5.33
‘siddha-loka’ nāma tāra prakṛtira pāra cit-svarūpa, tāṅhā nāhi cic-chakti vikāra
[‘siddha-loka’ naama taara prakritira paara chit-svaroopa, taanhaa naahi chich-chakti vikaara]
Blended reading (Sanskrit + English inline)
‘siddha-loka’ nāma tāra prakṛtira pāra cit-svarūpa, tāṅhā nāhi cic-chakti vikāra
That region is called Siddhaloka, and it is beyond the material nature. Its essence is spiritual, but it does not have spiritual varieties.
My note
Source: vedabase.io