BAYHAQI 4298:
from Ibn ʿAbbās —
[Machine] The Messenger of Allah ﷺ said, "I was not commanded to build the mosque." Ibn Abbas said, "You should adorn it as the Jews and Christians adorned their places of worship." This is the wording of the hadith of Ar-Ruzdibari, and in the narration of Abu Sa'eed it mentioned the mosques but did not mention the Christians.
البيهقي ٤٢٩٨:
عن ابن عباس —
قَالَ رَسُولُ اللهِ ﷺ مَا أُمِرْتُ بِتَشْيِيدِ الْمَسْجِدِ قَالَ ابْنُ عَبَّاسٍ لَتُزَخْرِفُنَّهَا كَمَا زَخْرَفَتِ الْيَهُودُ وَالنَّصَارَى لَفْظُ حَدِيثِ الرُّوذَبَارِيِّ وَفِي رِوَايَةِ أَبِي سَعِيدٍ الْمَسَاجِدَ وَلَمْ يَذْكُرِ النَّصَارَى
hadithunlocked.com