Hadithcore
Mishkat al-Masabih, 1641, 1642

‘Ubada b. as-Samit reported God's messenger as saying, “The best shroud is a lower garment and one which covers the whole body, (The Arabic has <i>al-kulla</i>, which means the two garments known as the <i>izar</i> (lower garment) and <i>rida'</i> (a cloak which covers the whole body)) and the best sacrifice is a horned ram." Abu Dawud transmitted it; and Tirmidhi and Ibn Majah transmitted it from Abu Umama.

وَعَنْ عُبَادَةَ بْنِ الصَّامِتِ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «خَيْرُ الْكَفَنِ الْحُلَّةُ وَخَيْرُ الْأُضْحِيَةِ الْكَبْشُ الْأَقْرَنُ» . رَوَاهُ أَبُو دَاوُد وَرَوَاهُ التِّرْمِذِيُّ وَابْنُ مَاجَهْ عَنْ أَبِي أُمَامَةَ

References1 variant
In-Book Reference
Book 5, Hadith 117