Musar zu Mischlej 9:6

and in the world to come he will attain the merited (share of its) bliss, which man realizes because of his serving the Lord with his substance in almsgiving. Thus it is said (Isa. liii. 12), "Therefore will I divide him a portion with the great." Since liberality was a virtue of our father Abraham, peace be upon him, he became known thereby and it was ascribed to him. This quality is attributed to him in the Holy Scripture in several places, and thus is to be understood the explanation of (Ps. xlvii. 9), "The generous of the people are gathered together, even the people of the God of Abraham." This is a commendable quality because it secures honor for him who exercises it. Thus it is said (Prov. xix. 6), "Many will entreat the favor of the generous, and every man is a friend to him that giveth gifts."