SB 3.33.31

tad vīrāsīt puṇyatamaṁ
 kṣetraṁ trailokya-viśrutam
nāmnā siddha-padaṁ yatra
 sā saṁsiddhim upeyuṣī
Word for word: 
tat — that; vīra — O brave Vidura; āsīt — was; puṇya-tamam — most sacred; kṣetram — place; trai-lokya — in the three worlds; viśrutam — known; nāmnā — by the name; siddha-padam — Siddhapada; yatra — where; sā — she (Devahūti); saṁsiddhim — perfection; upeyuṣī — achieved.
Translation: 
The place where Devahūti achieved her perfection, my dear Vidura, is understood to be a most sacred spot. It is known all over the three worlds as Siddhapada.