Shiva Purana
महासंकल्पमार्गेण संकल्प्यास्मद्गुरोरिह॥ पूजां करिष्य इत्युक्त्वा ततो दर्भानुस्पपृशेत्॥ ४ ॥
By the path of great resolution, resolve to be resolved here by our spiritual master. Having said this one should perform worship and then touch the darbha grass.
english translation
mahAsaMkalpamArgeNa saMkalpyAsmadguroriha॥ pUjAM kariSya ityuktvA tato darbhAnuspapRzet॥ 4 ॥
hk transliteration by Sanscript