Abu Burdah bin Abi Musa narrated from his father that when Umar (may Allah be pleased with him) was stabbed, Suhayb (may Allah be pleased with him) began to say: Alas, my brother! Umar (may Allah be pleased with him) said to him: O Suhayb! Do you not know that the Messenger of Allah (peace and blessings be upon him) said: "The deceased is punished because of the weeping of the living."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7167