ॐ हं हनुमते नमः ॥
ॐ आञ्जनेयाय विद्महे वायुपुत्राय धीमहि । तन्नो हनुमत् प्रचोदयात् ॥
Hanuman
Two short mantras of Hanuman. The first, Om Ham Hanumate Namah, uses Ham as the seed syllable of Hanuman and is a simple bow to him. The second is the Anjaneya Gayatri, which asks us to know the son of Anjana, meditate on the son of Vayu, and be guided by Hanuman. They are chanted for strength and courage, commonly 108 times, especially on Tuesdays and Saturdays.
ॐ हं हनुमते नमः ॥
ॐ आञ्जनेयाय विद्महे वायुपुत्राय धीमहि । तन्नो हनुमत् प्रचोदयात् ॥
Wording checked against: Sanskrit Documents: Anjaneya Gayatri, Dhyanam, Trikala Vandanam (Gayatri text) https://sanskritdocuments.org/doc_hanumaana/anjaneya.itx; Mahakatha: Hanuman Gayatri Mantra https://mahakatha.com/mantras/hanuman/hanuman-gayatri-mantra/; Srimandir: Om Ham Hanumate Namaha https://www.srimandir.com/articles/mantra-aarth-or-unke-labh/om-ham-hanumate-namaha. Editions differ slightly; follow your family's or guru's version if it differs.