Proof of kissing thumbs when hearing the name of holy prophet

Once, the Holy Prophet (sallal
laahu alaihi wasallam) entered
the Masjid and sat down near a
pillar. Hazrat Abu Bakr Siddique
(radi Allahu anhu) was seated
beside him. Hazrat Bilal (radi
Allahu anhu) then stood up and
commenced with the Azaan.
When he said: "Ash hadu Ana
Muhammadur Rasoolullah",
Hazrat Abu Bakr Siddique (radi
Allahu anhu) placed both the
thumb nails on to his eyes and
said "Qurratu Aini bika Ya
Rasoolallah" (Ya Rasoolallah! You
are the coolness of my eyes).
When Hazrat Bilal (radi Allahu
anhu) completed the Azaan, the
Holy Prophet (sallal laahu alaihi
wasallam) said, "O Abu Bakr!
Whosoever does like you have
done, Almighty Allah will forgive
all his sins." (Tafseer Roohul
Bayaan)
7. Sayyiduna Imam Hassan (radi
Allahu anhu) said, "Whosoever
hears the Mu'azzin say 'Ash Hadu
Ana Muhammadur Rasoolullah'
and says, 'Marhaba bi Habibi' and
'Quratu Aini Muhammad bin
Abdullah' and then kisses both
thumbs and keeps it on his eyes,
then he will never become blind
and his eyes will never be
sore." (Maqaaside Husna)