Sayyiduna Anas (may Allah be pleased with him) said: When Sayyiduna Umar (may Allah be pleased with him) was struck with the dagger, Sayyidah Hafsah (may Allah be pleased with her) lamented over him, and he said: O Hafsah! Did you not hear the Messenger of Allah (peace and blessings be upon him) say: "The one over whom wailing is done is punished." Likewise Sayyiduna Suhayb (may Allah be pleased with him) lamented and wept, and Sayyiduna Umar (may Allah be pleased with him) said: O Suhayb! Do you not know that "the one over whom lamentation is made is punished"?
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7168