Jerusalem Talmud Berakhot 4:1
תלמוד ירושלמי ברכות ד׳:א׳
Jerusalem Talmud Berakhot 4:1
Rav bows at "praised are You" and straightens up when mentioning Hashem's name; Samuel explains this by the verse "The Lord straightens the bent ones," while Rebbi Abun argues that one should bow before mentioning Hashem's name based on the verse "before My Name he is low.
מִילְתָא דְּחָנָן בַּר אַבָּא פְלִיגָא דְּחָנָן בַּר וָוא אָמַר לַחֲבֵרָיָא נֵימָר לְכוֹן מִילְתָא טָבְתָּא דְחָמִית לְרַב עֲבִיד וְאַמְרִתָהּ קוֹמֵי שְׁמוּאֵל וְקָם וְנָשַׁק עַל [פּוּמִי]. בָּרוּךְ אַתָּה שׁוֹחֵחַ. בָּא לְהַזְכִּיר אֶת הַשֵּׁם זוֹקֵף. שְׁמוּאֵל אָמַר וַנָּא אֲמָרִית טַעֲמָא יי זוֹקֵף כְּפוּפִים. אָמַר רִבִּי אַמִּי לֹא מִסְתַּבְּרָא דְלָא אֲמַר אֶלָּא מִפְּנֵי שְׁמִי נִיחַת הוּא. אָמַר רִבִּי אָבוּן אִלּוּ הֲוָה כְתִיב בִּשְׁמִי נִיחַת הוּא הֲוָה יֵאוּת. לֵית כְּתִיב אֶלָּא מִפְּנֵי שְׁמִי נִחַת הוּא. קוֹדֶם עַד שֶׁלֹּא הִזְכִּיר אֶת הַשֵּׁם כְּבָר נִחַת הוּא.
The word of Ḥanan bar Abba disagrees since Ḥanan bar Abba said to the colleagues: I shall tell you one of the good things that I saw Rav do and, when I told it before Samuel he got up and kissed me on my mouth. At “praised are You”, he bows down. When he comes to mention Hashem, he straightens up. Samuel said: I shall give the reason (Ps. 35:10): “The Lord straightens the bent ones.” Rebbi Ammi said: It is not reasonable, but (Mal. 2:5): “Before My Name he is low.” Rebbi Abun said: If it were written “at My Name he is low” then you would be right, but it is written “before My Name he is low”, before he mentions Hashem he is low.