Srimad-Bhagavatam: Canto 2 - Chapter 1 - Verse 24
Sanskrit:
तेषु यज्ञस्य पशव: सवनस्पतय: कुशा: ।इदं च देवयजनं कालश्चोरुगुणान्वित: ॥ २४ ॥
ITRANS:
teṣu yajñasya paśavaḥsavanaspatayaḥ kuśāḥidaṁ ca deva-yajanaṁkālaś coru-guṇānvitaḥ
Translation:
For performing sacrificial ceremonies, one requires sacrificial ingredients, such as flowers, leaves and straw, along with the sacrificial altar and a suitable time [spring].