 Umar also held that in the court the Judge should not be praised and that all acts should be judged according to the test of public interest.He also gave a general law that any act which did not harm any one and was otherwise not forbidden under law was permissible.The concepts of welfare and pension were introduced in early Islamic law as forms of "Zakat" (charity tax), one of the Five Pillars of Islam, under Umar in the 7th century.