Matsyapurana 158.34

158.34

*śarva uvāca
niṣiktamardhaṃ devyāṃ me śukrasya śukavigraha
lajjayā viratisthāyāṃ tvamardhaṃ piba pāvaka //

Agni assuming the form of a parrot saw through an opening the Lord enjoying the company of Parvatî when getting annoyed Śiva said 'This hindrance has been caused by you and the essence will, therefore, get within you Agni thus addressed swallowed the semen virile of Mahâdeva holding it in His palms—24-26