He put his hand away from...
Stopped dealing with..., stopped continuing with...
("In the morning sow your seed and until evening do not withhold your hand, for you do not know which will prosper, this or that, or whether both of them will be good" - Ecclesiastes 6:16, and so: "He bought for him the treasure of Hebrew words, the Azkanazi, for their shoulders, and he did not withdraw his hand from them until they taught him by mouth" - Agnon/ On the Caps of the Lock, 265)
Translation
Expression (Hebrew)
הִנִּיחַ יָדוֹ מ...
Definition (Hebrew)
חָדַל לַעֲסֹק ב..., הִפְסִיק מִלְּהַמְשִׁיךְ ב...
("בַּבֹּקֶר זְרַע אֶת זַרְעֶךָ וְלָעֶרֶב אַל תַּנַּח יָדֶךָ, כִּי אֵינְךָ יוֹדֵעַ אֵי זֶה יִכְשָׁר הֲזֶה אוֹ זֶה וְאִם שְׁנֵיהֶם כְּאֶחָד טוֹבִים"- קֹהֶלֶת יָא ו, וְכֵן:"קָנָה לוֹ אֶת אוֹצַר הַמִּלִּים הָעִבְרִי הָאַזְכְּנָזִי לְשׁוּלְבּוֹיְם וְלֹא הִנִּיחַ יָדוֹ מִמֶּנּוּ עַד שֶׁלָּמְדוּ עַל פֶּה"- עַגְנוֹן/ עַל כַּפּוֹת הַמַּנְעוּל, 265)