fast of ... fourth month - On the fourth month of the eleventh year of Zedekiah’s reign, on the ninth day, Jerusalem was taken (Jer 39:2; Jer 52:6, Jer 52:7). It was therefore made a fast day.
fifth ... seventh - (See on Zec 7:3; see on Zec 7:5).
tenth - On the tenth month and tenth day, in the ninth year of Zedekiah, the siege began (Jer 52:4).
therefore love the truth - or, “only love.” English Version is better. God’s blessing covenanted to Israel is not made to depend on Israel’s goodness: but Israel’s goodness should follow as the consequence of God’s gracious promises (Zec 8:16, Zec 8:17; Zec 7:9, Zec 7:10). God will bless, but not those who harden themselves in sin.