1752/1 - Abu Hurayrah (may Allah be pleased with him) reportedly said: “It was made prohibited to place the hands upon the waist in prayer.” [Narrated by Al-Bukhāri and Muslim]
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1) It is prohibited to place the hands upon the waist during prayer, given the reported prohibition in this regard.
2) One should meet the Shariah texts with submission and compliance, without any objection or questioning in search of the reason behind any ruling. Indeed, all goodness lies in what we are commanded to do and all evil lies in what we are prohibited from, even if we fail to grasp the intended wisdom.