Hadithcore
Mishkat al-Masabih, 1946

He reported God’s messenger as saying, “The most excellent <i>sadaqa</i> consists in your satisfying a hungry stomach.”* Baihaqi transmitted it in <i>Shu’ab al-iman</i>. * Literally “liver.”

وَعَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَفْضَلُ الصَّدَقَةِ أَنْ تُشْبِعَ كَبِدًا جَائِعًا» . رَوَاهُ الْبَيْهَقِيُّ فِي شُعَبِ الْإِيمَانِ

References1 variant
In-Book Reference
Book 6, Hadith 171