B.G 6.43

तत्र तं बुद्धिसंयोगं लभते पौर्वदेहिकम्। यतते च ततो भूयः संसिद्धौ कुरुनन्दन ॥४३॥

tatra taṁ buddhisaṁyogaṁ labhate paurvadehikam। yatate ca tato bhūyaḥ saṁsiddhau kurunandana ॥43॥

[तत्र तं बुद्धि संयोगं लभते पौर्व देहिकम्। यतते च ततो भूयः संसिद्धौ कुरु नन्दन॥
तत्र (tatra) - there; तं (tam) - that; बुद्धि-संयोगम् (buddhi-saṁyogam) - connection of intellect; लभते (labhate) - attains; पौर्व-देहिकम् (paurva-dehikam) - from the previous body; यतते (yatate) - strives; च (ca) - and; ततः (tataḥ) - then; भूयः (bhūyaḥ) - further; संसिद्धौ (saṁsiddhau) - for perfection; कुरु-नन्दन (kuru-nandana) - O descendant of the Kurus (Arjuna);]

O descendant of the Kurus, there, he regains the connection of intellect from his previous body, and he strives even further for perfection.