Musnad Ahmad 2698

Ibn Hubairah narrated: Someone who heard it told me that Ibn 'Abbas (رضي الله عنه) said: I heard the Messenger of Allah (ﷺ) say: “Fear the three things that incur curses." It was said: What are the things that incur curses, O Messenger of Allah? He said: “Relieving oneself in a place where people seek shade, in the road or in a pond.”