Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 26

Sanskrit:

भार्याशतेन निर्विण्ण ऋषयोऽस्य कृपालव: ।इष्टिं स्म वर्तयांचक्रुरैन्द्रीं ते सुसमाहिता: ॥ २६ ॥

ITRANS:

bhāryā-śatena nirviṇṇaṛṣayo ’sya kṛpālavaḥiṣṭiṁ sma vartayāṁ cakruraindrīṁ te susamāhitāḥ

Translation:

Although Yuvanāśva went into the forest with his one hundred wives, all of them were very morose. The sages in the forest, however, being very kind to the King, began very carefully and attentively performing an Indra-yajña so that the King might have a son.

Purport:

One may enter the vānaprastha order of life with his wife, but the vānaprastha order means complete retirement from household life. Although King Yuvanāśva retired from family life, he and his wives were always morose because he had no son.