As for the third

It's Zakat ...Poor Dues

including the different types of Zakat:
Zakat-Al-Fitr,Money Zakat,Crop Zakat ect

It is through Zakat that money and crops etc.are protected,hatred and spleen are overcome and love and affability are developed to be everywhere in hearts of the faithful



source : Islamic Selection for Al-Azhar Institutes


waiting me again for fourth pillar