Sheva was the scribe, and Zadok and Abiathar were the priests.

Benaiah son of Jehoiada was commander of ¹  the army. Zadok and Abiathar were priests.

Zadok son of Ahitub and Ahimelech son of Abiathar ¹  were priests; Seraiah was scribe;

Ahitub was the father of Zadok, and Zadok was the father of Ahimaaz.

Ahitub was the father of Zadok, and Zadok was the father of Shallum.

along with Zadok, a young warrior, and twenty-two leaders from his family.

Zadok son of Ahitub and Abimelech son of Abiathar were priests; Shavsha ¹  was scribe;

David, Zadok (a descendant of Eleazar), and Ahimelech (a descendant of Ithamar) divided them into groups to carry out their assigned responsibilities. ¹ 

But Zadok the priest, Benaiah son of Jehoiada, Nathan the prophet, Shimei, Rei, and David’s elite warriors ¹  did not ally themselves ²  with Adonijah.

The scribe Shemaiah son of Nethanel, a Levite, wrote down their names before the king, the officials, Zadok the priest, Ahimelech son of Abiathar, and the leaders of the priestly and Levite families. One family was drawn by lot from Eleazar, and then the next from Ithamar. ¹ 

Just like their relatives, the descendants of Aaron, they also cast lots before King David, Zadok, Ahimelech, the leaders of families, the priests, and the Levites. The families of the oldest son cast lots along with the those of the youngest. ¹ 

I gave instructions ¹  that Shelemiah the priest, Zadok the scribe, and a certain Levite named Pedaiah be put in charge of ²  the storerooms, and that Hanan son of Zaccur, the son of Mattaniah, be their assistant, ³  for they were regarded as trustworthy. It was then their responsibility to oversee the distribution to their colleagues. ⁴