Bhagavad Gita 2.62

ध्यायतो विषयान्पुंसः सङ्गस्तेषूपजायते।सङ्गात् संजायते कामः कामात्क्रोधोऽभिजायते ॥२.६२॥

dhyāyato viṣayānpuṃsaḥ saṅgasteṣūpajāyatesaṅgāt saṃjāyate kāmaḥ kāmātkrodho’bhijāyate

When one thinks of objects, attachment to them arises; from attachment, desire is born; from desire, anger arises.

गीता