Sayyiduna Ibn Mas'ud (may Allah be pleased with him) said: A man passed by another man who was in prostration, and he stepped on his neck. The man said: "Do you step on my neck while I am in prostration? By Allah, Allah will never forgive you!" Then Allah said: "Do you swear an oath against Me? Indeed, I have forgiven him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8763