Caitanya-caritāmṛta 11.147
śuddha kevala-prema śaṅkara-upare ataeva tomāra saṅge rākhaha śaṅkare
[shuddha kevala-prema shankara-upare ataeva tomaara sange raakhaha shankare]
Blended reading (Sanskrit + English inline)
śuddha kevala-prema śaṅkara-upare ataeva tomāra saṅge rākhaha śaṅkare
“Therefore keep your younger brother Śaṅkara with you because he is connected to Me by pure unalloyed love.”
My note
Source: vedabase.io