Abu hurairah said that the Messenger of Allah (May peace be upon him) forbade putting hands on the waist during prayer. Abu Dawud said; The word Ikhtisar means to put one’s hands on one’s waist.  

نَهَى رَسُولُ اللَّهِ ﷺ عَنْ الاِخْتِصَارِ فِي الصَّلاَةِ  

Kneeling places, or, where they kneel to drink water.  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنِ الصَّلاَةِ فِي أَعْطَانِ الإِبِلِ