In Bereishit 21, Avraham sends Hagar and Ishmael out with water. When the water ran out, she tosses him over to some bushes and removes herself so as not to see him dying. According to pasuk 16, she cries. [text from chabad.org]
16.And she went and sat down from afar, at about the distance of two bowshots, for she said, "Let me not see the child's death." And she sat from afar, and she raised her voice and wept. טז.וַתֵּלֶךְ וַתֵּשֶׁב לָהּ מִנֶּגֶד הַרְחֵק כִּמְטַחֲוֵי קֶשֶׁת כִּי אָמְרָה אַל אֶרְאֶה בְּמוֹת הַיָּלֶד וַתֵּשֶׁב מִנֶּגֶד וַתִּשָּׂא אֶת קֹלָהּ וַתֵּבְךְּ:
17.And God heard the lad's voice, and an angel of God called to Hagar from heaven, and said to her, "What is troubling you, Hagar? Fear not, for God has heard the lad's voice in the place where he is. יז.וַיִּשְׁמַע אֱלֹהִים אֶת קוֹל הַנַּעַר וַיִּקְרָא מַלְאַךְ אֱלֹהִים | אֶל הָגָר מִן הַשָּׁמַיִם וַיֹּאמֶר לָהּ מַה לָּךְ הָגָר אַל תִּירְאִי כִּי שָׁמַע אֱלֹהִים אֶל קוֹל הַנַּעַר בַּאֲשֶׁר הוּא שָׁם:
But the text never indicates that the boy cried! His mother did and yet the meforshim like Rashi point out that it was HIS prayers which were answered:
From here [we learn] that the sick person’s prayer is more effective than the prayer of others on his behalf, and is the first to be accepted. — [from Gen. Rabbah 53:14]
Why would the text overtly ascribe the crying to Hagar and then have that crying ignored, because unmentioned crying is more powerful?