Reference

Nehemiah 6:1-3 (ESV)

1 Now when Sanballat and Tobiah and Geshem the Arab and the rest of our enemies heard that I had built the wall and that there was no breach left in it (although up to that time I had not set up the doors in the gates), 

2 Sanballat and Geshem sent to me, saying, “Come and let us meet together at Hakkephirim in the plain of Ono.” But they intended to do me harm.

3 And I sent messengers to them, saying, “I am doing a great work and I cannot come down. Why should the work stop while I leave it and come down to you?”