It has also been said that the word ribāt in this context is a noun for whatever is used to bind a thing, meaning that these noble practices restrain their practitioner from sin and hold him back from it.
The author cited these two hadiths in the chapter entitled “The Numerous Pathways to Good” because they mention many avenues of righteousness: the five daily prayers; from one Friday to the next; from Ramadan to the next; frequent steps to the mosques; perfecting wuduʾ when it is difficult; and waiting expectantly for the next prayer after finishing the current one. Allah is the One who grants success.
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132 — Sixteenth narration: Abu Musa al-Ashʿari (may Allah be pleased with him) reported that the Messenger of Allah ﷺ said, “Whoever performs the two cool prayers shall enter Paradise.” Agreed upon.
(The two cool prayers are Fajr and ʿAsr.)
133 — Seventeenth narration: From the same Companion, he said that the Messenger of Allah ﷺ said, “When a servant falls ill or travels, there is recorded for him the same as what he used to do while resident and healthy.” Reported by al-Bukhari.
[Explanation]
The author—may Allah have mercy on him—relates from Abu Musa al-Ashʿari (may Allah be pleased with him) that the Prophet ﷺ said, “Whoever performs the two cool prayers shall enter Paradise.”