Amr bin al-Sharid (may Allah have mercy on him) narrates from his father, Sayyiduna al-Sharid (may Allah be pleased with him), that the Prophet (peace and blessings be upon him) passed by him while he was sitting like this, leaning on the fleshy part of his palm behind his back, and he (peace and blessings be upon him) said: "This is the way of sitting of those who have earned wrath."
Hadith Referenceالمعجم الكبير للطبراني / باب الشين / 7211