Arthashastra
एक देश दत्त शुल्कं त्रीणि तीर्थान्य् अश्रूयमाणम्, श्रूयमाणं सप्त तीर्थान्य् आकाङ्क्षेत ॥
In the case of a husband who is gone abroad and is not heard of, his wife shall, if she has received only a part of sulka from him, wait for him for the period of three menses; but if he is heard of, she shall wait for him for the period of seven menses.
english translation
eka deza datta zulkaM trINi tIrthAny azrUyamANam, zrUyamANaM sapta tIrthAny AkAGkSeta ॥
hk transliteration by Sanscript