Nehemiah 6:17
Moreover in those days the nobles of Judah sent many letters unto Tobiah, and the letters of Tobiah came unto them.
Cross-reference
Nehemiah 3:5
Parallel
In Nehemiah 3:5, nobles of Tekoa refused to work — parallel to nobles in 6:17 secretly communicating with Tobiah.
Nehemiah 13:28
Parallel
In Nehemiah 13:28, a high priest's son marries Sanballat's daughter — another example of alliance with enemies, like nobles' letters to Tobiah.
Nehemiah 13:4
Parallel
Nehemiah 13:4 shows the priest Eliashib allied with Tobiah — a later consequence of the same corrupt network begun with the nobles' letters.
Nehemiah 5:7
Parallel
In Nehemiah 5:7, he rebukes nobles for usury — another instance of noble corruption, like their secret letters to Tobiah.