Explanation of the hadith
The Prophet (may Allah's peace and blessings be upon him) forbade praying while putting the hands on the waist.
عن أبي هريرة رضي الله عنه ، قال: «نهى النبي صلى الله عليه وسلم أن يصلي الرَّجُلُ مُخْتَصِرًا».
Abu Hurayrah (may Allah be pleased with him) reported: The Prophet (may Allah's peace and blessings be upon him) forbade praying with one's hands on one's waist.
The Prophet (may Allah's peace and blessings be upon him) forbade praying while putting the hands on the waist.