Likutei Moharan 2:4/ליקוטי מוהר"ן ב׳:ד׳

14. And how does one merit the aspect of mishpat? through charity. In giving charity one embraces the attribute of mishpat. As it is written (Deuteronomy 33:21), “He executed the charity of God and His mishpatim”; and as in (Psalms 99:4), “You execute mishpat and charity in Yaakov.”

2For charity <is itself> a product of mishpat, as in (Psalms 75:8), “The Lord is judge, He brings down one and lifts up another”—He impoverishes one and enriches another. And when a person gives charity, he corresponds to “brings down one <and lifts up another>.” <He “brings down one,”> because he subtracts from his own money; and he “lifts up another,” because he enriches the poor man. Consequently, through this he embraces the attribute of mishpat .

3This is the reason it is necessary to donate charity before praying; so that he will “y’KhaLKeiL d’varav (order his words) with mishpat”—he can “strike at a hair and not miss.”

4Our Sages taught: Why did Yaakov give the rights of the firstborn to Yosef? because he provided for him. This is like the parable of the householder who supported an orphan in his home… (Bava Batra 123a).

5It is written (Genesis 47:12), “And Yosef y’KhaLKeiL (provided) his father and brethren and all his father’s household with bread, lephiy hataf (according to their little ones).” {The word “HaTaF” also denotes speech,} as in (Ezekiel 21:2), “HaTeiF (preach) to the south.” Lephiy hataf indicates that [Yosef’s] prayers flowed from his lips. And, because of [Yosef’s] charitable deed, Yaakov, the aspect of mishpat, granted him the rights of the firstborn—the aspect of prayer. As is written, “I [Yaakov,] have given you one portion….” Specifically “I,” for he is the aspect of mishpat .