1 Maccabees 16:12

12 because he was Simon's son-in-law.

1 Maccabees 16:12 In-Context

10 The escaping soldiers fled to the towers in the fields at Azotus, and John set fire to the city. On that day, 2,000 enemy soldiers were killed, and John returned safely to Judea.
11 Simon the High Priest had appointed Ptolemy son of Abubus commander for the Plain of Jericho. Ptolemy was very rich,
12 because he was Simon's son-in-law.
13 But he became too ambitious and wanted to take over the country. So he devised a plan to assassinate Simon and his sons.
14 Simon, together with his sons Mattathias and Judas, was visiting the towns in the area, in order to take care of their needs. They arrived in Jericho in the month of Shebat, the eleventh month, in the year 177.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.