what will save you against satan

On 'Uthman's authority,
meaning b. 'Affan (r.a.),
he said:
I wished than I had asked God's Messenger (s.a.a.s):
"what saves us from that which is thrown into us by Satan?"

so Abu Bakr (r.a.) said:
"I asked him (s.a.a.s) about that,
then he (s.a.a.s) said:"

"(this is an example of what) saves you from that:
I ordered a blind man to say (something),
then he didn't say it"

(Musnad Ahmad)

Meaning:
when satan
orders you - who are blind to him -
to say something,
don't say it!
and that will protect you
against his whispers