Rahu Deva Mantra:
Ardhakaayam Mahaaviiryam
Chandraa Aditya Vimardanam
Simhikaagarbha Sambhuutam
Tam Rahu Pranamaamyaham
Meaning: I offer my obeisance to Rahu, born from the womb of Simhika, who has only half a body yet posses great power, being able to subdue the Sun and the Moon.
Rahu Gayatri Mantra:
OMM NAKHA DHVAJAAYA VIDMAHE
PADMA HASTAAYA DHIIMAHI
TANNO RAHUH PRACHODAYAAT
Rahu Moola Mantra with Beeja Syllables:
Om Bhraam Bhriim Bhraum Sah Raahave Namaha