He raised a finger
To point or indicate. By metaphor: to ask for permission to speak.
(Modern Hebrew)
Translation
Expression (Hebrew)
הֵרִים אֶצְבַּע
Definition (Hebrew)
הִצְבִּיעַ. בְּהַשְׁאָלָה: בִּקֵּשׁ אֶת רְשׁוּת הַדִּבּוּר.
(הָעִבְרִית הַחֲדָשָׁה)