I didn't. Did they record before Santana or write it for him. People would be amazed how many recording artists wrote songs for their labels/friends and never recorded those songs.
WIKI
“Black Magic Woman” is a song written by British musician Peter Green, which first appeared as a Fleetwood Mac single in various countries in 1968, subsequently appearing on the 1969 Fleetwood Mac compilation albums English Rose (US) and The Pious Bird of Good Omen (UK), as well as Vintage Years.
In 1970, it became a hit by Santana, as sung by Gregg Rolie, reaching No. 4 in the US and Canadian charts, after appearing on their Abraxas album.