Ata' bin Abi Muslim عطاء بن أبي مسلم · The Book on Military Expeditions

"We did not pledge to the Messenger of Allah (ﷺ) for death, but only that we would not flee." This Hadith is Hasan Sahih, meaning both of the Ahadith are Sahih. Some of his Companions pledged to him for death, they said only: "We will not leave from in front of you as long as we are not killed." While others pledged him by saying: "We will not flee."