Curiosity about holy paladins having more hp than others

[Esploratore]

Hi, I have this curiosity because I noticed a friend of mine as holy had 4,2 mil hp or something like that in 905 item level, while for example a ret paladin in 908 has barely 3,9.

The anomaly is about that specific class + spec combo (holy paladin) because if you take my dk in 902 as frost, he also has 3,7 mil, while a holy paladin in only 895 has 4 mil!

Holy paladins must have a passive, or something, that increases their hp significantly compared to every other dps\healer class except fury warriors (fury has a 15% increase in hp), I don't know if it's a trait or if it's a passive non-trait ability, anyone has any idea what's the ability or trait that makes this difference?

Generally I'd expect a 905 to have around 3,85 mil hp, they have over 4,2 mil, so it's suspiciously close to 10% more than classes typically have, so I wonder if someone who is more expert (never played holy) knows about any passive that would do that.

[Hypasonic]

Don't main holy but have 1 as an alt, basically due to them having some abilities that cost them a % of their HP. Such as, Hand of Sacrifice, the aura sacrifice, the instant heal (forgot name) so I guess its similar to fury warriors who have high HP but take more damage during enrage. "Class fantasy" or something.

[Kaeth]

As Hypasonic already stated, Holy Paladins have abilities which damage them or reroute damage to them from other players. As a result, they are granted 15% additional HP by the Righteousness passive starting at level 63.

[Snorri]

Actually the reason they added extra hp was because holy paladins originaly had shields which made them sturdier. But contrary to shaman, their 1H + shield got replaced by a 2H, so they got this buff to compensate.

Their holy artifact adds 30% armor to replace the shield.

[SnorlaxJeng]

Because of it having the following skills:
-Passive Aura (Close Range)
-Aura of Sacrifice (Talented)
-Light of the Matyr (Self damage for heals)

[Esploratore]

Ah, ok, thanks for the answers, thought it was something like it (righteousness), didn't know that it was because of abilities that sacrifice their hp to heal; fury warriors, even though the spell says 15%, have even more hp comparatively (my warrior has 5 mil while dk with 2 more item level has 3,7) but indeed they take a lot more damage when enraged, and the better gear, the more enrage uptime ofc.