Hadithcore
Mishkat al-Masabih, 2170

‘Abd al-Mālik b. ‘Umair reported in <i>mursal</i> form that God's mes­senger said, “<i>Fātihat al-Kitāb</i> contains healing for every disease.” Dārimī and Baihaqi, in <i>Shu'ab al-īmān</i>, transmitted it.

وَعَنْ عَبْدِ الْمَلِكِ بْنِ عُمَيْرٍ مُرْسَلًا قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «فِي فَاتِحَةِ الْكِتَابِ شِفَاءٌ مِنْ كُلِّ دَاءٍ» . رَوَاهُ الدَّارمِيّ وَالْبَيْهَقِيّ فِي شعب الْإِيمَان

References1 variant
In-Book Reference
Book 8, Hadith 60