Hadithcore
Mishkat al-Masabih, 924

He also reported God’s Messenger as saying, “God has angels who travel about in the earth and convey to me greetings from my people.” Nassa’i and Darimi transmitted it.

وَعَنِ ابْنِ مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ لِلَّهِ مَلَائِكَةً سَيَّاحِينَ فِي الْأَرْضِ يُبَلِّغُونِي مِنْ أُمَّتِيَ السَّلَامَ» . رَوَاهُ النَّسَائِيّ والدارمي

References1 variant
In-Book Reference
Book 4, Hadith 347