Bāhuka died when he was old, and one of his wives wanted to die with him, following the satī rite. At that time, however, Aurva Muni, knowing her to be pregnant, forbade her to die.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वृद्धं तं पञ्चतां प्राप्तं महिष्यनुमरिष्यती । और्वेण जानताऽऽत्मानं प्रजावन्तं निवारिता
vṛddhaṃ taṃ pañcatāṃ prāptaṃ mahiṣyanumariṣyatī | aurveṇa jānatā''tmānaṃ prajāvantaṃ nivāritā
SB 9.8.3