Brihatparasharahorashastra 57.79

57.79

dvisaptamasthite rāhau dehavādhāṃ vinirdiśet
taddoṣaparihārārthaṃ mṛtyuñjayajapaṃ caret

If Rāhu is situated in the second or seventh house, one should indicate bodily affliction. / To ward off that evil effect, one should perform the recitation of the Mṛtyuñjaya mantra;