ŚB 12.2.11
Canto 12, Chapter 2, Text 11
त्रिंशद्विंशतिवर्षाणि परमायु: कलौ नृणाम् ॥ ११ ॥
triṁśad viṁśati varṣāṇi
paramāyuḥ kalau nṛṇām
paramāyuḥ kalau nṛṇām
Word by word
triṁśat — thirty; viṁśati — plus twenty; varṣāṇi — years; parama-āyuḥ — the maximum duration of life; kalau — in Kali-yuga; nṛṇām — of men.
Translation
The maximum duration of life for human beings in Kali-yuga will become fifty years.