Bhagavad Gita 16.8

They say the universe is an accident with no purpose and no God. Life is created through sexual union, a product of lust and nothing else.

असत्यमप्रतिष्ठं ते जगदाहुरनीश्वरम्।अपरस्परसम्भूतं किमन्यत्कामहैतुकम्॥

asatyamapratiṣṭhaṃ te jagadāhuranīśvaram|aparasparasambhūtaṃ kimanyatkāmahaitukam||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).