The Prophets supplication during his last illness
A’ishah (radi Allahu anha) reported: While the Prophet (sal Allahu alaihi wa sallam) was reclining against me (during his last illness) I heard him saying: “Allahumma-ghfir li, warhamni, wa alhiqni bir Rafiqil-A’la (O Allah, forgive me, bestow Your Mercy on me and let me join with the exalted companions.”
[Sahih Al-Bukhari and Muslim]
Most of the ‘Ulama’ (Scholars) believe that Allah is the Sublime Companion (Ar-Rafiq Al-A’la).
Ar-Rafiq (the Companion) is one of the Divine Names. Some take it to mean the supreme communion of angels, Prophets, martyrs and the righteous.
Prophet Yusuf had prayed to Allah, As Allah says (interpretation of the meaning): “… And join me with the righteous.” (Yusuf, 12:101)
At the hour of death, man should cut off his link with the world and unite it with the Hereafter. By seeking Divine forgiveness, the Prophet (sal Allahu alaihi wa sallam) aimed at moral elevation and abundance of goodness. Otherwise, he was protected by Allah and immune against sinning.
And Allah knows best!