عَنْ عَبْدِ الرَّحْمَنِ بْنِ شِبْلٍ الْأَنْصَارِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ: إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ نَهَى فِي الصَّلَاةِ عَنْ ثَلَاثٍ، نَقْرِ الْغُرَابِ، وَاِفْتِرَاشِ السَّبُعِ، وَأَنْ يُوَطِّنَ الرَّجُلُ الْمُقَامَ الْوَاحِدَ كَإِيَطَانِ الْبَعِيرِ
Sayyiduna Abdur Rahman bin Shibl Ansari (may Allah be pleased with him) says: Verily, the Messenger of Allah (peace and blessings be upon him) forbade three things in prayer: pecking like a crow, spreading (the hands) like a beast of prey, and for a man to designate a specific spot in the mosque like a camel.