His heart is anxious; his heart is anxious about/ to care (be concerned) for/ his heart trembled for
To worry; to fear that something has happened.
("And he came, and behold, Eli was sitting on the seat by the wayside, watching, for his heart was anxious for the ark of God; and the man came to bring the news in the city, and all the city cried out" - 1 Samuel 4:13, and likewise: "In trepidation of heart I revealed my secret to the old man, and he blessed me with the gaze of his eyes" - H.N. Bialik, Megillat Ha-Esh (6), and likewise: "I said to her, I dreamed a dream. And when I said so, my heart suddenly trembled" - S.Y. Agnon, The Doctor and His Divorced Wife)
Translation
Expression (Hebrew)
חָרֵד לִיבּוֹ, חָרֵד לִיבּוֹ עַל
Definition (Hebrew)
דָּאַג. פַּחַד שֶׁמָּא אֵרַע מַשֶּׁהוּ.
("וַיָּבוֹא וְהִנֵּה עֵלִי יֹשֵׁב עַל הַכִּסֵּא יַךְ יַד דֶּרֶךְ מְצַפֶּה כִּי הָיָה לִבּוֹ חָרֵד עַל אֲרוֹן הָאֱלֹהִים וְהָאִישׁ בָּא לְהַגִּיד בָּעִיר וַתִּזְעַק כָּל הָעִיר"- שְׁמוּאֵל א ד יג, וְכֵן:"בְּחֶרְדַּת לֵבָב גִּלִּיתִי אֶת סוֹדִי לַזָּקֵן, וְיִבְרָכֵנִי בְּמַבָּטִי עֵינָיו"- ח.נ. בְּיָאלִיק/ מְגִלַּת הָאֵשׁ (ו), וְכֵן:"אָמַרְתִּי לָהּ חֲלוֹם חָלַמְתִּי. וּכְשֶׁאָמַרְתִּי כֵּן חָרַד לִבִּי פִּתְאוֹם"- שַׁ"י עַגְנוֹן/ הָרוֹפֵא וּגְרוּשָׁתוֹ)