Azraq bin Qays reported,

I saw an elderly man in al-Ahwaz praying the afternoon prayer with the reins of his mount in his hand. The animal kept stepping backward, and he kept stepping back along with it. A man from the Khawarij was sitting nearby insulting him.When he finished his prayer, he said, "I heard what you were saying. I went on six or seven military expeditions with the Messenger of Allah ﷺ and witnessed how he made things easy. I prefer to bring my mount back with me rather than leave it to wander off to where it is used to going, because that would be a hardship for me."I said, "How many units did he pray?"He said, "Two."This man turned out to be Abu Barza.

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الأزرق بن قيس قال

رأيت شيخا بالأهواز يصلي العصر ولجام دابته في يده فجعلت تتأخر وجعل ينكص معها ورجل قاعد من الخوارج يسبه فلما صلى قال إني قد سمعت مقالتكم غزوت مع رسول الله ﷺ ست غزوات أو سبع غزوات فشهدت أمره وتيسيره فكنت أرجع معي دابتي أحب إلي من أن أدعها فتأتي مألفها فيشق علي قال قلت كم صلى قال ركعتين قال وإذا هو أبو برزة