A short sentence, etc. usually known by many people, stating something commonly experienced or giving advice. (Cambridge Dictionary)
A proverb is a short sentence that people often quote, which gives advice or tells you something about life. (Collins Dictionary)
A short, well-known pithy saying, stating a general truth or piece of advice. (Oxford Dictionaries)
A brief popular epigram or maxim: Adage. (Merriam – Webster)
22 Most Beautiful Proverbs from Around the World.