Narrated Sahl bin Sa'd:
"We were with the Messenger of Allah (ﷺ) while he was excavating the trench, and we were transporting the soil. He passed by us and said: 'O Allah! There is no life but the life of the Hereafter! So forgive the Ansar and the Emigrants.'" (JA)
English reference (JA): Vol. 1, Book 46, Hadith 3856 (JA)
Arabic reference (JA): Book 49, Hadith 4229 (JA)