Surah Al-Qasas (The Stories), Verse 10

وَاَصْبَحَ فُؤَادُ اُمِّ مُوْسٰی فٰرِغًا اِنْ كَادَتْ لَتُبْدِیْ بِهٖ لَوْلَاۤ اَنْ رَّبَطْنَا عَلٰی قَلْبِهَا لِتَكُوْنَ مِنَ الْمُؤْمِنِیْنَ ۟

Wa asbaha fu'aadu ummi Moosaa faarighan in kaadat latubdee bihee law laaa arrabatnaa 'alaa qalbihaa litakoona minal mu'mineen

“But there came to be a void in the heart of the mother of Moses: She was going almost to disclose his (case), had We not strengthened her heart (with faith), so that she might remain a (firm) believer.”

Quran 28:10 (Yusuf Ali Translation)