Even when reflected in various objects, the sun is never divided, nor does it merge into its reflection. Only those with dull brains would consider the sun in this way. Similarly, although the soul is reflected through different material bodies, the soul remains undivided and nonmaterial.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
बुध्यते स्वे न भेदेन व्यक्तिस्थ इव तद्गतः । लक्ष्यते स्थूलमतिभिरात्मा चावस्थितोऽर्कवत्
budhyate sve na bhedena vyaktistha iva tadgataḥ | lakṣyate sthūlamatibhirātmā cāvasthito'rkavat
SB 11.7.51