Behold, he cometh with the clouds (ιδου ερχετα μετα των νεφελων). Futuristic present middle indicative of ερχομα, a reminiscence of Daniel 7,13Markus 13,26Markus 14,62Matthäus 24,30Matthäus 26,64Lukas 21,27

Shall see (οψετα). Future middle of οραω, a reminiscence of Zechariah 12,10Matthäus 24,30Offenbarung 26,64Offenbarung 14,14Offenbarung 14,18-20Offenbarung 19,11-21Offenbarung 20,7-10

And they which (κα οιτινες). "And the very ones who," Romans and Jews, all who shared in this act.

Pierced (εξεκεντησαν). First aorist active indicative of εκκεντεω, late compound (Aristotle, Polybius, LXX), from εκ and κεντεω (to stab, to pierce), in N.T., only here and John 19,37Sacharja 12,10

Shall mourn (κοψοντα). Future middle (direct) of κοπτω, old verb, to cut, "they shall cut themselves," as was common for mourners (Matthew 11,17Lukas 8,52Lukas 23,27Sacharja 12,12Offenbarung 18,9

Tribes (φυλα). Not just the Jewish tribes, but the spiritual Israel of Jews and Gentiles as in Revelation 7:4-8