[INDOLOGY] Some assistance

[Olivelle, J P]

I feel somewhat stupid, but I have a citation in a book I am editing and I had traced it to “Śikṣāgrantha 31.7”. But for the life of my I cannot trace this book in my computer!! Would anyone have some idea about it? The two verses cited from it are:

तथा शिक्षायाम् ।
छन्द: पादौ तु वेदस्य हस्तौ कल्पोऽथ पठ्यते ।
शिक्षा घ्राणं तु वेदस्य मुखं व्याकरणं स्मृतम् ॥
ज्योतिषामयनं चक्षुर्निरुक्तं श्रोत्रमुच्यते ।
तस्मात् साङ्गमधीत्यैव ब्रह्मलोके महीयते ॥ इति । 

Thanks for your help.

Patrick