عَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - قَالَ : { نَهَى رَسُولُ اَللَّهِ - صلى الله عليه وسلم -أَنْ يُصَلِّيَ اَلرَّجُلُ مُخْتَصِرًا } مُتَّفَقٌ عَلَيْهِ , وَاللَّفْظُ لِمُسْلِمٍ . 1
وَمَعْنَاهُ : أَنْ يَجْعَلَ يَدَهُ عَلَى خَاصِرَتِهِ 2
English
Abu Hurairah (RA):
Allah's Messenger (ﷺ) forbade keeping one's hands on one's waist while praying.
[Agreed upon].
The wording is that of Muslim's.
And it's meaning is to put (one's) hands on his waist.