Bhagavad Gita 13.20

कार्यकारणकर्तृत्वे हेतुः प्रकृतिरुच्यते।पुरुषः सुखदुःखानां भोक्तृत्वे हेतुरुच्यते॥

kāryakāraṇakartṛtve hetuḥ prakṛtirucyate |puruṣaḥ sukhaduḥkhānāṃ bhoktṛtve heturucyate ||

In the production of the effect and the cause, Nature (matter) is said to be the cause; in the experience of pleasure and pain, the soul is said to be the one responsible.

Nature is the law that generates cause and effect; God is the source of all pleasure and pain.

Our plain-language meaning of this verse is waiting for scholar review.