मनुस्मृति - कुपुत्रः

यादृशं फलमाप्नोति कुप्लवैः संतरन् जलम् |
तादृशं फलमाप्नोति कुपुत्रैः संतरंस्तमः ||

- मनुस्मृति

If you plan to navigate through darkness(miseries) of the world with the help of a bad son, then you will meet with the same fate as if you tried to cross the ocean using a bad boat (with holes).

- Manu Smriti