Quran 28:10 Al-Qasas, ayah 10 of 88

وَأَصْبَحَ فُؤَادُ أُمِّ مُوسَىٰ فَـٰرِغًا ۖ إِن كَادَتْ لَتُبْدِى بِهِۦ لَوْلَآ أَن رَّبَطْنَا عَلَىٰ قَلْبِهَا لِتَكُونَ مِنَ ٱلْمُؤْمِنِينَ ۝١٠

28:10 And the heart of the mother of Moses became void, and she would have betrayed him if We had not fortified her heart, that she might be of the believers.