Yaakov vows that from everything that he will receive from Hashem, he will give one tenth to charity. It may be noted from this verse that the mitzvah of charity does not apply only to monetary matters, but the mitzvah applies to anything one receives as Hashem’s gift. If one is blessed with wisdom and knowledge, it is imperative for him to share this gift with others who are not as fortunate as he. Rabbi Shimon Shkopf Zt”l remarked that just like one who is generous with his money merits that his possessions will increase, so too, if one is “charitable” with his skills and talents, he will be similarly blessed by Hashem. It has been noted by many, that only after volunteering and sharing their time in tutoring others, did they themselves succeed in Torah study. This is obviously in the merit of giving charity