Bhagavad Gita 12.7
तेषामहं समुद्धर्ता मृत्युसंसारसागरात्। भवामि नचिरात्पार्थ मय्यावेशितचेतसाम्।।12.7।।
teṣāmahaṃ samuddhartā mṛtyusaṃsārasāgarāt| bhavāmi nacirātpārtha mayyāveśitacetasām||12.7||
teshamaham samuddharta mrityusamsarasagarat bhavami naciratpartha mayyaveshitacetasam12.7
Meaning
...for them, whose minds are fixed on Krishna, He swiftly becomes the deliverer from the ocean of birth and death. Krishna personally rescues His devoted ones.
हे पार्थ! जिनका चित्त मुझमें ही स्थिर हुआ है ऐसे भक्तों का मैं शीघ्र ही मृत्युरूप संसार सागर से उद्धार करने वाला होता हूँ।
This is verse 7 of 20 in Chapter 12 (Bhakti Yoga) of the Bhagavad Gita.