Muhammad Had No Assurance of Salvation

Muslims regularly pray for Allah to bless Muhammad with peace. But why would Muhammad be affected by the prayers of Muslims? The reason is that, according to Islam, even Muhammad didn't know what Allah would do to him after he died (Quran 46:9). But if Muhammad himself had no assurance of salvation, what hope is there for his followers?

For more on Muhammad's lack of assurance, see the following articles by Sam Shamoun:

"Praying for Muhammad’s Peace and Security: More Islamic Evidence That Muhammad Is not Saved"
"Was Muhammad Certain of His Salvation?"