Los Angeles, July 15 (IANS): Singer Madonna is at the receiving end after posting a photograph of her two adopted black children - David Ritchie and Mercy James - rubbing her feet.

The 56-year-old posted an image on photo-sharing website Instagram showing her lying on the floor while Ritchie and James kneeled in front of her and rubbed her feet, reports aceshowbiz.com.

"#motherlove...............how I'm gonna get through the day. Mercy and David give the best foot rubs!!! #rebelhearts," Madonna captioned it.

Some of the micro-blogging website Twitter users slammed Madonna for posting the photograph, accusing her of treating her adopted children like slaves because they're black.

A user, Wendy Williams reposted Madonna's image along with caption, "HOT QUESTION: Are you offended by the photo Madonna posted?"

@AH0LYF00L wrote: "I cant believe Madonna still has slaves to rub her feet!" @HolyJaxon tweeted, "Wow @ madonna hiring slaves."

However, the "Like a virgin" hitmaker received support from her fans.