Murih ibn Masruq reported: Umar ibn al-Khattab, may Allah be pleased with him, said, “You consider yourselves to be believers while among you a believer is starving?”
Source: Musnad al-Shāmīyīn 1040
عَنْ مُرِيحِ بْنِ مَسْرُوقٍ قال قال عُمَر بْن الْخَطَّاب رضي الله عنه تَزْعُمُونَ أَنَّكُمْ مُؤْمِنُونَ وَفِيكُمْ مُؤْمِنٌ جَائِعٌ
1040 مسند الشاميين للطبراني