Halachot that Come out of Melachim

In Melachim B (Kings II) chapter 12, When King Yehoash (Jehoash) begins fundraising for refurbishing Beit Hamikdash (the Holy Temple),  he orders that people should donate money to a Cohen (priest) with whom they are acquainted.  This seems to be within the theme of first seeing to the needs of one’s own community, and only later to the needs of the larger congregation.  When the repairs do not proceed apace, he orders a collection box be placed on the right side of the doorpost as one entered the temple, presumably that being the most visible spot.  The Talmud uses this as the argument in favor of affixing a mezuzah on the right side of one’s doorpost.