Bukhari

Hadith Commentary:
From this last sentence, the second subject of the chapter is established. Abdullah ibn al-Mubarak was among the Rabbani scholars.
He was an Imam, jurist, hadith memorizer, ascetic, pious, generous, and experienced.
Allah, the Exalted, did not create any trait among the traits of goodness except that He granted it to Abdullah ibn al-Mubarak.
He taught hadith in Baghdad.
He was born in the year 118 AH and passed away in the year 181 AH.
Rabbī tawaffanī musliman wa alhiqnī bis-sālihīn (My Lord, cause me to die as a Muslim and join me with the righteous), ameen.

Hadith Commentary:
(1)
In the Prophetic era, the construction of footwear was similar to the modern-day flip-flop. In it, there was a piece of leather between the toes, and its other end was tied to the strap (zamaam). The strap is also called "qibaal." In this type of footwear, most of the foot remains exposed. The Messenger of Allah (sallallahu alayhi wa sallam) used to wash his feet without removing them, as is explicitly mentioned in the hadith. (: Sahih al-Bukhari, Book of Ablution, Hadith: 166) It is narrated from Ibn Abbas (radi Allahu anhu) that he said the sandals of the Messenger of Allah (sallallahu alayhi wa sallam) had two straps, whose laces were double. (: Sunan Ibn Majah, Book of Clothing, Hadith: 3614)

(2)
Hafiz Ibn Hajar (rahimahullah) has written that the second part of the chapter heading is established in this way: since the sandals of the Messenger of Allah (sallallahu alayhi wa sallam) had two straps, it is established that each sandal had one strap. (: Fath al-Bari: 10/385)