Verse 52

बन्धुरेवापरिज्ञातो ह्यबन्धुरिति कथ्यतेपरिज्ञातो भवेद्बन्धुरबन्धुभ्रमनाशनात्

In plain words

A kinsman indeed, unrecognized, is called 'no kinsman'; recognized, he becomes a kinsman indeed, through the destruction of the illusion 'no kinsman.'