Brihajjataka 7.9

7.9

sva matena kila āha jīva śarmā graha dāyaṃ parama āyusaḥ svara aṃśam/
graha bhukta nava aṃśa rāśi tulyaṃ bahu sāmyaṃ samupaiti satya vākyam//(upacchandasikā)

According to his own view, Jīvaśarman indeed declared the planetary lifespan contribution to be one-seventh part of the maximum longevity;
the statement of Satya, equal to the signs and navāṃśas traversed by the planets, attains much agreement.