Hadithcore
Hadith #2105400

al-Baihaqi reported it in brief as a Mursal (missing link after the Tabi'i) from Sa'id bin al-Musaiyab.

وَهُوَ فِي مُرْسَلِ سَعِيدِ بْنِ اَلْمُسَيَّبِ عِنْدَ اَلْبَيْهَقِيِّ مُخْتَصَر ٌ [1]‏ .‏

References2 variants
Sunnah.com reference
Book 2, Hadith 356
Arabic/English book reference
Book 2, Hadith 437