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abudawud:4863And Hb b. Baqiyyah > Khālid > Ḥumayd > Anas

when the Prophet ﷺ walked, it looked as if he bent forwards.  

أبو داود:٤٨٦٣حَدَّثَنَا وَهْبُ بْنُ بَقِيَّةَ أَخْبَرَنَا خَالِدٌ عَنْ حُمَيْدٍ عَنْ أَنَسٍ قَالَ

كَانَ النَّبِيُّ ﷺ إِذَا مَشَى كَأَنَّهُ يَتَوَكَّأُ