Surya Siddhanta
क्रान्तिसञ्ज्ञा तया सूर्यः सदा पर्येति भासयन् । चन्द्राद्याश् च स्वकैः पातैर् अपमण्डलम् आश्रितैः॥
And called the circle of declination (krdnti) : upon that the sun constantly revolves, giving light : the moon and the other planets also, by their own nodes, which are situated in the ecliptic (apamandala).
english translation