Talmud Bavli – Berakhot 31a
Berakhot 31a:27
The Gemara recounts how Channah's prayer was of such intensity that Eli thought she was drunk — teaching that true prayer involves the complete absorption of one's being in the act of supplication, an outpouring of the soul (shefoch nefesh) that goes beyond ordinary self-awareness. Chassidic masters cite this as the talmudic root of histpashtut hagashmiyus.
אָמַר רַב הַמְנוּנָא: כַּמָּה הִלְכְתָא גִּבָּרָווֹתָא אִיכָּא לְמִשְׁמַע מֵהָנֵי קְרָאֵי דְחַנָּה. ״וְחַנָּה הִיא מְדַבֶּרֶת עַל לִבָּהּ״ — מִכָּאן לַמִּתְפַּלֵּל צָרִיךְ שֶׁיְּכַוֵּין לִבּוֹ. ״רַק שְׂפָתֶיהָ נָּעוֹת״ — מִכָּאן לַמִּתְפַּלֵּל שֶׁיַּחְתּוֹךְ בִּשְׂפָתָיו. ״וְקוֹלָהּ לֹא יִשָּׁמֵעַ״ — מִכָּאן שֶׁאָסוּר לְהַגְבִּיהַּ קוֹלוֹ בִּתְפִלָּתוֹ. ״וַיַּחְשְׁבֶהָ עֵלִי לְשִׁכֹּרָה״ — מִכָּאן שֶׁשִּׁכּוֹר אָסוּר לְהִתְפַּלֵּל.
Rav Hamnuna said: How many significant halakhot can be derived from these verses of the prayer of Hannah? As it says: “And Hannah spoke in her heart, only her lips moved and her voice could not be heard, so Eli thought her to be drunk” (I Samuel 1:13). The Gemara elaborates: From that which is stated here: “And Hannah spoke in her heart,” the halakha that one who prays must focus his heart on his prayer is derived. And from that which is stated here: “Only her lips moved,” the halakha that one who prays must enunciate the words with his lips, not only contemplate them in his heart, is derived. From that which is written here: “And her voice could not be heard,” the halakha that one is forbidden to raise his voice in his Amida prayer as it must be recited silently. From the continuation of the verse here: “So Eli thought her to be drunk,” the halakha that a drunk person is forbidden to pray. That is why he rebuked her.