Of Asher he said: Asher is blessed with children, may he be favored by his brothers and may he dip his foot in olive oil. ¹ 

then his sister-in-law must approach him in view of the elders, remove his sandal from his foot, and spit in his face. ¹  She will then respond, “Thus may it be done to any man who does not maintain his brother’s family line!” ²