It is narrated from Sayyiduna al-Ash'ath bin Qays (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever does not show mercy to the Muslims, Allah will never show mercy to him."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Alqamah bin Marthad except Hisham bin Abd al-Rahman, and it is not narrated from Sayyiduna al-Ash'ath bin Qays (may Allah be pleased with him) except with this chain."
Hadith Referenceالمعجم الأوسط / باب الميم / 6188
Hadith Gradingمحدثین:فيه من لم يُعرف
Hadith Takhrij«قال الهيثمي: رواه الطبراني في الأوسط وفيه من لم أعرفه «مجمع الزوائد ومنبع الفوائد، ج 8، ص 187»»