His passing away at the age of 63 – a sign of his close relationship with the Holy Prophet
There is a Hadith in Sahih Muslim:
Hadhrat Mu‘awiyah (May Allah be well pleased with him) said: When the Holy Prophet (Sallallahu alaihi wa sallam) passed away into the presence of Allah, His age was 63. Then Hadhrat Abu Bakr (May Allah be well pleased with him) passed away, his age was also 63. Then Hadhrat Umar (May Allah be well pleased with him) passed away and his age was also 63 years. (Sahih Muslim, Hadith No. 3244)
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