The Voice (Ju Men, 巨门) in the Parents palace (Fu Mu, 父母)

What the classic says, Zi Wei Dou Shu Quan Shu (紫微斗数全书), volume two

Badly placed, injury and harm, the line left, adopted out. With the Sun (太阳), little harmony; with the Strategist (天机), a second set of parents; with the Blessing (天同), no harm, or the inheritance recedes. With the six malefics, the parents are not both kept.

巨门陷地伤克弃祖过房，太阳同少和，天机同重，拜天同同或退祖无刑，加羊陀火铃空劫父母不周全。

“Well placed” and “badly placed” refer to the star’s brightness in the branch the palace falls on: the same star in the same palace reads differently bright and dim, and the clause says how.

Source

And in the chapter of questions on the stars (Zhu Xing Wen Da Lun, 諸星問答論)

set aside by the parents

在父母則遭棄擲

How this placement actually turns up

• Well placed (exalted or strong) in 68% of those charts, badly placed (fallen) in 17%, in between the rest.
• Alone in the palace in 51%; sharing it with The Strategist (天机) 17%, The Sun (太阳) 16%, The Blessing (天同) 15%.
• Carries a birth-year transformation in 32%: Fortune (化禄) 11%, Power (化权) 11%, Trouble (化忌) 10%.
• How often the conditions the classic’s line names actually occur — one of the four difficult stars (擎羊陀罗火星铃星) in the palace with it: 30%; Earth Void or Earth Robbery (地空地劫) with it: 15%.

Counted by casting every day from 1950 to 2009 at each of the twelve hours — 262,980 charts, 8.3% of which have The Voice here (every main star sits in every palace in about one chart in twelve). A count, not a reading.