The following verse has been used in a couple of answers here and this blog post claims the verse is from the Padma Purāṇa although it doesn't mention the chapter # or the context.
Definition [of ṛṇānubandhana] from the The Padma Purana
Runanubhanda Rupena Pashu Patni Suta Aalaya
Runakshaye Kshyayaanthi Tatra Parivedana<p>Meaning: Every relationship is the result of previous birth bondage. Once the debt is annihilated, there is no relationship and hence the end of suffering in this Saṃsāra.</p>
Is Padma Purāṇa really the source of this verse?