Back in 2009, Nas was ordered to pay Kelis $50K a month for child support when she filed for divorce while she was 7 months pregnant.

Nas is now accusing Kelis of keeping him from seeing their now 8 year-old son, Knight.

According to reports, Nas has filed court docs claiming ex-wife Kelis only allows him visitation when it’s convenient for her which can sometimes be months at a time.

Nas is asking the courts to set scheduled visitation.