Shiva Purana
दशैवाहुतयस्तत्र पञ्च वा त्रितयं च वा ॥ होतव्याः शक्तितो दद्यादेकमेवाथ वाहुतिम् ॥ ३२ ॥
The number of Āhutis shall be ten, five or three according to capacity. It is enough even if one Āhuti is made.
english translation
dazaivAhutayastatra paJca vA tritayaM ca vA ॥ hotavyAH zaktito dadyAdekamevAtha vAhutim ॥ 32 ॥
hk transliteration by Sanscript