Verses with the word sixty in the Old Testament (10 verses):

Genesis 5:15
And Mahalaleel lived sixty and five years, and begat Jared:

Genesis 5:18
And Jared lived an hundred sixty and two years, and he begat Enoch:

Genesis 5:20
And all the days of Jared were nine hundred sixty and two years: and he died.

Genesis 5:21
And Enoch lived sixty and five years, and begat Methuselah:

Genesis 5:23
And all the days of Enoch were three hundred sixty and five years:

Genesis 5:27
And all the days of Methuselah were nine hundred sixty and nine years: and he died.

Leviticus 27:3
And thy estimation shall be of the male from twenty years old even unto sixty years old, even thy estimation shall be fifty shekels of silver, after the shekel of the sanctuary.

Leviticus 27:7
And if it be from sixty years old and above; if it be a male, then thy estimation shall be fifteen shekels, and for the female ten shekels.

Numbers 7:88
And all the oxen for the sacrifice of the peace offerings were twenty and four bullocks, the rams sixty, the he goats sixty, the lambs of the first year sixty. This was the dedication of the altar, after that it was anointed.

Ezra 2:13
The children of Adonikam, six hundred sixty and six.