Psalmorum 133

1 Canticum graduum David. Ecce quam bonum et quam jucundum, habitare fratres in unum!

It is very good and very pleasant for God’s people to gather together harmoniously.

2 Sicut unguentum in capite, quod descendit in barbam, barbam Aaron, quod descendit in oram vestimenti ejus;

It is [as delightful as] the precious/expensive ([olive] oil/perfume) that runs down from [the Supreme Priest] Aaron’s head onto his beard [when he is anointed] and runs down onto the collar of his robes.

3 sicut ros Hermon, qui descendit in montem Sion. Quoniam illic mandavit Dominus benedictionem, et vitam usque in sæculum.

Gathering together harmoniously [is as delightful] as the dew [that falls] on Hermon [Mountain] and the dew that falls on the hills near Zion [Hill]. Yahweh has promised to bless [his people there in Jerusalem] [by giving them] everlasting (OR, a long-lasting) life.