Bhaṭṭikāvya 1.11

1.11

aihiṣṭa taṃ kārayituṃ kṛtā''tmā kratuṃ nṛpaḥ putra-phalaṃ munīndram,
jñānā''śayas tasya tato vyatānīt sa karmaṭhaḥ karma sutā'nubandham.

Having purified himself, the king desired that lord of sages to perform the sacrifice that yields sons; / then that skilled priest, whose intention was guided by knowledge, carried out the ritual resulting in offspring.