Rav Moshe Feinstein writes in a teshuva (EH 4:26:4) that one must give a tenth of his time for others the same way one should give a tenth of his money. What are the earlier sources for such a concept?

  • 4
    Rav Moshe [in Vol. 9 pg. 368] suggests it as a possibility "אפשר לומר", not as a "must", so there most likely is no source that he knew of. Dec 8 '20 at 5:28
  • וְכֹל אֲשֶׁר תִּתֶּן לִי עַשֵּׂר אֲעַשְּׂרֶנּוּ לָךְ
    – The GRAPKE
    Dec 8 '20 at 5:31
  • very similar judaism.stackexchange.com/q/48828/759
    – Double AA
    Dec 8 '20 at 14:30
  • I recall a similar concept from Chasam Sofer, who is minutely earlier than R Chaim Palagi quoted in the answer
    – chortkov2
    Jan 8 '21 at 8:46
  • I know of a pshat from the Chida on a gemara in Kesubos. Would that be considered a source from the Chida or from Talmud Bavli?
    – JewishMale
    Jan 8 '21 at 13:25

Rabbi Haim Palachi (Nefesh Haim, ma’arechet Hei n. 7; s.v. ונלע״ד) articulated the idea of “tithing” one’s time by spreading or teaching Torah.

Similarly, Rabbi Shimon Shkop (Share Yosher, intro., s.v. וכן) expressed the importance of “spiritual tithes” whereby one enables another to grow in Torah.

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