Jaiminīya Upaniṣad Brāhmaṇa 2.9.10

2.9.10

tad u hovāca śāṭyāyanir bahuputra eṣa udgītha ity evopāsitavyam
bahavo hy eta ādityasya raśmayas te 'sya putrāḥ
tasmād bahuputra eṣa udgītha ity evopāsitavyam iti /
tṛtīye 'nuvāke tṛtīyaḥ khaṇḍaḥ /
tṛtīyo 'nuvākas samāptaḥ //

And regarding this, Śāṭyāyani said: 'One should meditate on this udgītha simply as "rich in sons". For many are these rays of Āditya; they are his sons. Therefore one should meditate on this udgītha simply as "rich in sons".' / The third khaṇḍa in the third anuvāka. / The third anuvāka is concluded.