thee. thee [O Zion] (feminine; agreeing with Zion), which is also feminine in verses: Zechariah 9:9; Zechariah 9:13.
the blood of thy covenant: or, thy covenant of blood. Reference to Pentateuch (Exodus 24:5-8) Compare Hebrews 13:20.
have sent forth. i.e. sent forth [from their captivity].
out of the pit, &c. Reference to Pentateuch (Genesis 37:24).