teṣu - in such sacrifices; yajñasya - of the sacrificial performance; paśavaḥ - the animals or the sacrificial ingredients; sa-vanaspatayaḥ - along with flowers and leaves; kuśāḥ - the straw; idam - all these; ca - as also; deva-yajanam - the sacrificial altar; kālaḥ - a suitable time; ca - as also; uru - great; guṇa-anvitaḥ - qualified.

For performing sacrificial ceremonies, one requires sacrificial ingredients, such as flowers, leaves and straw, along with the sacrificial altar and a suitable time [spring].