John Gill Commentary Nehemiah 2:10

"And when Sanballat the Horonite, and Tobiah the servant, the Ammonite, heard of it, it grieved them exceedingly, for that there was come a man to seek the welfare of the children of Israel." — Nehemiah 2:10 (ASV)

When Sanballat the Horonite
Who either presided at Horonaim, or sprung from thence, a city of Moab, (Isaiah 15:5)

and Tobiah the servant, the Ammonite ;
who was formerly a slave, but now raised, from a low mean estate, to be governor in the land of Ammon, though still a vassal of the king of Persia:

heard of it, it grieved them exceedingly that there came a man to seek
the welfare of the children of Israel ;
to which the Moabites and Ammonites were always averse, and ever bore an hatred to Israel, and envied everything that tended to their happiness.