Wa Alaikum Assalam wa Rahmatullahi wa Barakatuh. According to Ayatollah Sistani (may Allah protect him), a najis (impure) garment can be purified by placing it in a basin and pouring water over it. It is also sufficient to do the opposite: put water in the basin, then place the garment in it, and wring it out to remove the impurities. One washing is sufficient for impurities other than urine, while two washes are required for urine, provided the basin was not impure before placing the najis garment in it. If it was impure, then three washes are necessary, and it is recommended to wash three times in all cases. If the basin itself becomes najis (impure) due to reasons other than dog saliva, pig consumption, rodent death, or wine, and it is considered a utensil commonly used for food and drink in that area, it must be washed three times with water, preferably from a flowing source or rainwater. According to Ayatollah Khamenei (may Allah protect him), if the clothes are washed in the basin after the impurity has been removed once with water connected to a flowing source, or if the inside of the basin was pure before placing the clothes and they are washed twice with a small amount of water and wrung out in the usual manner, the clothes become pure. However, if the inside of the basin was najis before placing the clothes, three washes with a small amount of water are required. May you be successful in all good deeds.