Śrīmad-Bhāgavatam · Text 10.54.52
Who is speaking and story frame
अहत्वा दुर्मतिं कृष्णमप्रत्यूह्य यवीयसीम् ।
कुण्डिनं न प्रवेक्ष्यामीत्युक्त्वा तत्रावसद् रुषा ॥ ५२ ॥
ahatvā durmatiṁ kṛṣṇam
apratyūhya yavīyasīm
kuṇḍinaṁ na pravekṣyāmīty
uktvā tatrāvasad ruṣā
Because he had promised “I will not reenter Kuṇḍina until I have killed wicked Kṛṣṇa and brought back my younger sister,” in a mood of angry frustration Rukmī took up residence at that very place.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.