Hanuman Gayatri Mantra

For love of selfless service

Aum Anjaneyaye Vidmahe
Mahabalaye Dhimahi
Tanno Hanuman Prachodayat

Another similar Gayatri for Hanuman is:

Aum anjani sutaya cha vidmahe
Vayu putraya cha dhimahi
Tanno marutih prachodayat

Translation: “Om. Let us meditate on Sri Hanuman, whose mother is Anjani Devi. May that supremely brave and strong Maruti, son of the Wind god, inspire and illumine our mind and understanding.”