Brihajjataka 12.2

12.2

rajjur muśalaṃ nalaś cara ādyaiḥ satyaś ca āśrayaja āñja gāda yogān/
kendraiḥ sad asad yutair dala ākhyau srak sarpau kathitau parāśareṇa//(aupacchandasika)

Satyācārya declared the positional combinations Rajju, Musala, and Nala from movable [signs] onwards;
and from the cardinal houses occupied by benefics or malefics, the two called 'half' [combinations], Sraj and Sarpa, were stated by Parāśara.