Agnipurana 12.5

12.5

viṣṇuprayuktayā nītā devakījaṭharaṃ purā /
abhūcca saptamo garbho devakyā jaṭharād balaḥ //

directed by Viṣṇu, into the womb of Devakī in the past. / And the seventh embryo from the womb of Devakī was Bala;