וַיֵּצֵ֥א מֹשֶׁ֛ה וְאַהֲרֹ֖ן מֵעִ֣ם פַּרְעֹ֑ה וַיִּצְעַ֤ק מֹשֶׁה֙ אֶל־יְהוָ֔ה עַל־דְּבַ֥ר הַֽצְפַרְדְּעִ֖ים אֲשֶׁר־שָׂ֥ם לְפַרְעֹֽה׃
Rashi on Exodus
ויצא. . ויצעק THEY WENT … AND CRIED [UNTO THE LORD) immediately that they should be destroyed by to-morrow.
Sforno on Exodus
ויצעק משה אל ה' על דבר הצפרדעים אשר שם לפרעה, Moses prayed that G’d remove only the crocodiles which had been sent against Pharaoh and his people, whereas any others should remain in the river. It required a special prayer, here described as an outcry, to ask G’d how to arrange the removal of this plague.
Or HaChaim on Exodus
אשר שם לפרעה, which He had brought on Pharaoh. We learn from this that one must be articulate and precise when offering a request in prayer.