"And for their houses," meaning: and We would have made for their houses, "doors" of silver, "and couches" of silver, "upon which they recline."
﴿ولبيوتهم﴾ أَي: لجعلنا لبيوتهم ﴿أبوابا﴾ من فضَّة ﴿وسررا﴾ من فضَّة ﴿عَلَيْهَا يَتَّكِئُونَ﴾