15 So the wall was completed on the twenty-fifth of Elul, in fifty-two days. 16 When all our enemies heard about this, all the surrounding nations were afraid and lost their self-confidence, because they realized that this work had been done with the help of our God. 17 Also, in those days the nobles of Judah were sending many letters to Tobiah, and replies from Tobiah kept coming to them. 18 For many in Judah were under oath to him, since he was son-in-law to Shekaniah son of Arah, and his son Jehohanan had married the daughter of Meshullam son of Berekiah. 19 Moreover, they kept reporting to me his good deeds and then telling him what I said. And Tobiah sent letters to intimidate me.

Matthew Henry's Commentary on Nehemiah 6:15-19

Commentary on Nehemiah 6:15-19

(Read Nehemiah 6:15-19)

The wall was begun and finished in fifty-two days, though they rested on the sabbaths. A great deal of work may be done in a little time, if we set about it in earnest, and keep close to it. See the mischief of marrying with strangers. When men once became akin to Tobiah, they soon became sworn to him. A sinful love leads to a sinful league. The enemy of souls employs many instruments, and forms many projects, to bring reproach on the active servants of God, or to take them from their work. But we should follow the example of Him who laid down his life for the sheep. Those that simply cleave to the Lord and his work will be supported.