Śrīmad-Bhāgavatam · Text 11.18.17
Who is speaking and story frame
मौनानीहानिलायामा दण्डा वाग्देहचेतसाम् ।
न ह्येते यस्य सन्त्यङ्ग वेणुभिर्न भवेद् यति: ॥ १७ ॥
maunānīhānilāyāmā
daṇḍā vāg-deha-cetasām
na hy ete yasya santy aṅga
veṇubhir na bhaved yatiḥ
One who has not accepted the three internal disciplines of avoiding useless speech, avoiding useless activities and controlling the life air can never be considered a sannyāsī merely because of his carrying bamboo rods.
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.