Quotes from Scriptures

अहो दुर्जनसंसर्गात् मानहानिः पदे पदे ।
पावको लोहसंगेन मुद्रगरैरभिताद्यते ॥

When one is in the company of evil people he or she  gets  humiliated often. Just like even a peice of gold gets beaten again and again if it with an iron piece.