73. IstibrÁ is a procedure performed by men after urinating. Its purpose is to ensure that the fluid that is discharged after urinating does not have to be treated as urine. There are certain ways of performing istibrÁÞ. The best of them is that after passing urine, the middle finger of the left hand should be drawn across the area between the anus and the base of the penis. Then the thumb should be placed on the penis, and the forefinger below it, drawing the two to the point of circumcision three times. Finally the tip of the penis should be squeezed three times.