Shiva Purana
लिंगाद्धस्तशतं पुण्यं क्षेत्रे मानुषके विदुः । सहस्रारत्निमात्रं तु पुण्यक्षेत्रे तथार्षके ५५ ।
In a temple built by ordinary man, the space upto a hundred hastas (1 hasta = 30 cms) from the phallic image is holy. In a temple dedicated to sages, the space upto a thousand Aratnis (1 Aratni = 45 cms) from the phallic image is holy. In a temple dedicated to sages, the space upto a thousand Aratnis (1 Aratni = 45 cms) from the emblem is holy.
english translation
liMgAddhastazataM puNyaM kSetre mAnuSake viduH । sahasrAratnimAtraM tu puNyakSetre tathArSake 55 ।
hk transliteration by Sanscript