Sutra:
64. "maRanthum puRanthozhaa maanthar" enkaiyAlE.

Meaning:
By the divine words of Thirumazisai Azhvar that says Srivaishnavas are those who even if they forget His name will not become enslaved to another.

Sri PBA Swami's Sarartha Deepikai:
To explain the previous sutra, the 68th pasuram from Nanmugan Thiruvanthaathi ("maRanthum puRanthozhaa maanthar") is being shown as an example here. In Sri Vishnu Purana there is a sloka
"SvapurushamapivIkshya paasahaStam vadati yama: kila tasya karNamUle
parihara madhusUdanaprapannaan praburahamanyanruNaam na vaishNavaanaam".

This has been translated by Thirumazhisai Azhvar as
"thiRambElmin kaNdeer thiruvadi than naamam
maRanthum puRanthozhaa maantharai iRainjsiyum
saathuvaraayp pOthuminkaLenRaan namanum than
thoothuvaraik koovis sevikku".

The interesting phrase here is "thiruvadi than naamam maRanthum puRanthozhaa maanthar". adi, adikaL, thiruvadi all stand for Him. What is being shown in this phrase is that it is possible that one can even forget His divine nama; however, one should not be enslaved to another. For example, a wife may not have love for her husband; in time, she may become affectionate with him. But, it is not correct that she develops love for another. Similarly, in Sri Vishnu Purana the sage Parasara says "madhusUdana prapannaan" and Thirumazhisai Azhvar said the same as "maRanthum puRanthozhaa maanthar". Therefore it is very important, even more than having bhagavat sEshatvam, that bhaagavatas should not have anya sEshatvam.