The Talmud states that one who strikes another person transgresses a biblical prohibition — 'one who raises his hand against another, even if he did not strike him, is called a wicked person.'
מַגְבִּיהַּ, עַבְדּוֹ, שָׁבַת – סִימָן. אָמַר רֵישׁ לָקִישׁ: הַמַּגְבִּיהַּ יָדוֹ עַל חֲבֵירוֹ, אַף עַל פִּי שֶׁלֹּא הִכָּהוּ, נִקְרָא רָשָׁע, שֶׁנֶּאֱמַר: ״וַיֹּאמֶר לָרָשָׁע לָמָּה תַכֶּה רֵעֶךָ״. ״לָמָּה הִכִּיתָ״ לֹא נֶאֱמַר, אֶלָּא ״לָמָּה תַכֶּה״ – אַף עַל פִּי שֶׁלֹּא הִכָּהוּ נִקְרָא רָשָׁע. אָמַר זְעֵירִי אָמַר רַבִּי חֲנִינָא: נִקְרָא חוֹטֵא, שֶׁנֶּאֱמַר: ״וְאִם לֹא לָקַחְתִּי בְחׇזְקָה״, וּכְתִיב: ״וַתְּהִי חַטַּאת הַנְּעָרִים גְּדוֹלָה מְאֹד״. רַב הוּנָא אָמַר: תִּיקָּצֵץ יָדוֹ, שֶׁנֶּאֱמַר: ״וּזְרוֹעַ רָמָה תִּשָּׁבֵר״. רַב הוּנָא קַץ יְדָא.
The Gemara states a mnemonic for the upcoming statements of Reish Lakish: Raises, his slave, Shabbat. Reish Lakish says: One who raises his hand to strike another, even if he ultimately does not strike him, is called wicked, as it is stated: “And two men of the Hebrews were struggling with each other, and he said to the wicked one: Why should you strike your friend?” (Exodus 2:13). The phrase: Why did you strike, is not stated, but rather: “Why should you strike,” indicating that one who raised his hand to strike another, even if he ultimately did not strike him, is called wicked. Ze’eiri says that Rabbi Ḥanina says: One who raises his hand to strike another is called a sinner; as it is stated: “And the priest’s lad would come…and would say to him, but you shall give now, and if not, I will take by force” (I Samuel 2:15–16), and it is written with regard to this behavior: “And the sin of the youths was very great” (I Samuel 2:17). Rav Huna says: His hand should be cut off, as it is stated: “And the high arm shall be broken” (Job 38:15). If one habitually lifts his arm to strike others, it is better that it be broken. The Gemara relates that Rav Huna cut off the hand of a person who would habitually hit others.