Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 8
Sanskrit:
स ऋषि: प्रार्थित: पत्न्या श्वश्र्वा चापत्यकाम्यया ।श्रपयित्वोभयैर्मन्त्रैश्चरुं स्नातुं गतो मुनि: ॥ ८ ॥
ITRANS:
sa ṛṣiḥ prārthitaḥ patnyāśvaśrvā cāpatya-kāmyayāśrapayitvobhayair mantraiścaruṁ snātuṁ gato muniḥ
Translation:
Thereafter, Ṛcīka Muni’s wife and mother-in-law, each desiring a son, requested the Muni to prepare an oblation. Thus Ṛcīka Muni prepared one oblation for his wife with a brāhmaṇa mantra and another for his mother-in-law with a kṣatriya mantra. Then he went out to bathe.