A.T. Robertson Commentary Matthew 19:14

"But Jesus said, Suffer the little children, and forbid them not, to come unto me: for to such belongeth the kingdom of heaven." — Matthew 19:14 (ASV)

Suffer (αφετε). "Leave them alone." Second aorist active imperative.

Forbid them not (μη κωλυετε). "Stop hindering them." The idiom of μη with the present imperative means just that.

Of such (των τοιουτων). The childlike as in 18:3.