Pitṛgaṇa-Vibhāga (Classification of the Pitṛs) and the Śrāddha–Soma Nourishment Cycle
उमां देवः समुत्सृज्य शुक्रं भूमौ व्यसर्जयत् / ततो रुषितया सद्यः शप्तो ऽग्निरुमया तया
umāṃ devaḥ samutsṛjya śukraṃ bhūmau vyasarjayat / tato ruṣitayā sadyaḥ śapto 'gnirumayā tayā
The Deva (Shankara) withdrew from Uma and cast his śukra upon the earth. Then Uma, angered, at once pronounced a curse upon Agni.