When a person living in a temporary material body tries to construct a happy home, the result is fruitless and miserable. The snake, however, enters a home that has been built by others and prospers happily.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
गृहारम्भोऽति दुःखाय विफलश्चाध्रुवात्मनः । सर्पः परकृतं वेश्म प्रविश्य सुखमेधते
gṛhārambho'ti duḥkhāya viphalaścādhruvātmanaḥ | sarpaḥ parakṛtaṃ veśma praviśya sukhamedhate
SB 11.9.15