Śrīmad-Bhāgavatam · Text 11.8.21
Who is speaking and story frame
तावज्जितेन्द्रियो न स्याद् विजितान्येन्द्रिय: पुमान् ।
न जयेद् रसनं यावज्जितं सर्वं जिते रसे ॥ २१ ॥
tāvaj jitendriyo na syād
vijitānyendriyaḥ pumān
na jayed rasanaṁ yāvaj
jitaṁ sarvaṁ jite rase
Although one may conquer all of the other senses, as long as the tongue is not conquered it cannot be said that one has controlled his senses. However, if one is able to control the tongue, then one is understood to be in full control of all the senses.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.