Īśopaniṣad Mantra 13 · ईशोपनिषद् मन्त्र 13

अन्यदेवाहुः सम्भवादन्यदाहुरसम्भवात् । इति शुश्रुम धीराणां ये नस्तद्विचचक्षिरे ॥

anyad evāhuḥ sambhavād anyad āhur asambhavāt | iti śuśruma dhīrāṇāṁ ye nas tad vicacakṣire ||

Meaning

One result, they say, comes from sambhava; another, from asambhava — thus have we heard from the wise who declared it to us.