We have an altar (echomen thusiastērion). We Christians have a spiritual altar (thusiastērion), not a literal one (Heb 7:13). This metaphor is carried out.
Whereof (ex hou). Our spiritual altar.
The tabernacle (tēi skēnēi). Dative case with latreuontes (serve), skēnē being used for “the whole ceremonial economy” (Vincent) of Judaism.