Suhayl Ibn Bayda reported,

One night, while I was riding behind him, the Messenger of Allah ﷺ called out, "Suhayl bin Bayda!" He raised his voice as he called, repeating it several times, until those behind us and ahead of us heard him. They gathered around, realizing that he wanted to say something.He said, "Whoever says, 'There is no god but Allah,' Allah has guaranteed him Paradise for it, and has freed him by it from the Fire."

حدثنا هارون حدثنا ابن وهب قال حيوة حدثني يزيد بن الهاد عن محمد بن إبراهيم عن سعيد بن الصلت عن سهيل ابن البيضاء من بني عبد الدار قال بينما نحن في سفر مع رسول الله ﷺ فذكر معناه