Are you looking for Kissing Thumbs during Adhan” It is not only permissible but mustahab to kiss the thumbs and place them on the eyes when the Holy Name of the Holy Prophet (PBUH) is mentioned.
Kissing Thumbs during Adhan
This practice is the Sunnah of Caliph Rasool Syedna Abu Bakr Siddiq. Imam Sakhawi says in Al-Maqasid al-Hasna: When the name of Hazrat Muhammad comes in the Adhan, one should kiss the thumb and meet the eyes and recite this:
I bear witness that Muhammad, may God bless him and grant him peace, is the servant of God and His Messenger, and I bear witness that God is Lord, that Islam is the religion, and I agree to be a prophet of Muhammad (PBUH).
Read more: Allah-huma-bismika-amutu-wa-ahya
Kissing Thumbs Hadith
When Hazrat Abu Bakr heard the name of Hazrat Muhammad in the Adhan, he kissed thumb and met on eyes. Seeing this, the Holy Prophet (PBUH) said: “Whoever acts like my dear friend, my intercession is lawful for him.”
Mulla Ali Qari, while commenting on this hadith, says: If this practice is confirmed by Hazrat Abu Bakr Siddique (RA), then it is sufficient to follow it. The Holy Prophet (peace and blessings of Allah be upon him) said: “After me, my Sunnah and the Sunnah of the Righteous Caliphs are obligatory upon you.
Qurratu Aini Bika Ya Rasoolallah in Arabic
The imams and jurists also recommend kissing the thumb after hearing the blessed name of the Holy Prophet (PBUH) in the adhan.
Allama Ibn Abidin Shami says in his famous and well-known fatwa Rid al-Muhtar Ala al-Dur al-Mukhtar. It is recommended to say on hearing the name Muhammad for the first time in the adhan
صَلَّی اﷲُ عَلَيْکَ يَارَسُوْلَ اﷲِ
and on hearing it the second time say,
قُرَّةُ عَيْنِی بِکَ يَارَسُوْلَ اﷲِ
And then kiss the nails of your two thumbs and place them on your eyes and say
اَللّٰهُمَّ مَتِّعْنِیْ بِالسَّمْعِ وَالْبَصَرِ
Because surely the Holy Prophet (peace and blessings of Allah be upon him) will take the one who does this to Paradise.