رُبَّ فَقيرٍ أعزُّ مِنْ أسدٍ
Perhaps there is a poor person whose pride is more than a lion.
The Arabic word “رُبَّ” signifies rareness and fewness.
The Imam is saying some poor people have self-respect, dignity and pride that prevents them from begging. But those people are few in numbers.