Al-Rabia’ reported: Al-Shafi’i, may Allah have mercy on him, said, “Manhood is based upon four pillars: good character, generosity, humility, and cautious piety.”
Source: al-Sunan al-Kubrá 19165
عن الربيع قال الشافعي رحمه الله الْمُرُوءَةُ أَرْبَعَةُ أَرْكَانٍ حُسْنُ الْخُلُقِ وَالسَّخَاءُ وَالتَّوَاضُعُ وَالنُّسُكُ
19165 السنن الكبرى للبيهقي