6 of 11 added 2 characters in body

My Actual Final Song to Riley

Okay, this is my final Riley Riddle (and not my previous one), because I could not resist...
...and that meant this had to be even better.

Riddle me this:

My prefix will pray with an S,
My suffix is red with an A,
My infix, so ill with an F,
If only affixed with an E.

Because the answer is SAFE.


Note:

The answer is not "safe / SAFE". This is genuinely true; no wordplay involved.

Hint:

Although the verses do not rhyme,
I tell you this is not a crime.
Well, now it rhymes, but see not that!
A word at end, you should look at.

Now changing how you say this word,
Will highlight even when absurd;
Though then you might add properly,
To find the sharing property.


Any edits that I make will either be hints or grammatical improvements.