It is narrated from Yunus bin Abi Ishaq (may Allah have mercy on him): Some people came to Sayyiduna Khalid bin al-Walid (may Allah be pleased with him) to visit him in his illness, and one of them said: He is in the throes (of death). Khalid (may Allah be pleased with him) said: "Yes, by Allah, and for this I seek help from Allah alone."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3798