Hadith Q909
إِذْ هِيَ رَاحَةُ أَهْلِ النَّارِ، بِاللَّهِ نَتَعَوَّذُ مِنَ النَّارِ
Because this is the manner and style of resting of the people of Hell; we seek refuge with Allah Almighty from the fire of Hell.
Hadith 909
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Placing hands on the side (hip) during prayer is the way of comfort and relaxation of the people of Hell."