Qays bin Abi Hazim (may Allah have mercy on him) said: I saw that poison was brought to Sayyiduna Khalid bin al-Walid (may Allah be pleased with him), and he said: "What is this?" The people said: It is poison. He said: "Bismillah (In the name of Allah)," and swallowed it.
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3794