A benefic alone in the 10th bhava from the lagna or from the Moon, with no malefic in that house. A malefic joining the same house voids the yoga.
Fruit
Fame lasting as long as the moon and stars, honour from the king, abundant pleasures, charity, affection for relatives and a pious, virtuous life.
Meaning
Amala means spotless, and the yoga is the unafflicted benefic in the house of action: good reputation earned in the world. It is one of the few classical yogas whose fruit is explicitly moral rather than material, though it promises the material as well.