but are neglectful of their Salah (offer Prayers but disregard the very purpose of establishing Salah - to have the fear of Allah and be mindful to the needs of other people)
Dr. Munir Munshey
Those among them who stay unmindful of their "salat´
Dr. Kamal Omar
those: they are in error regarding their salat (canonical Prayer)
Who are unaware of (the spirit of) their Prayers (i.e., they are mindful only of the rights of Allah, but are heedless of the rights of fellow human beings)
Who are heedless (cocooned) of (the experience of the meaning of) their salat (which is an ascension [miraj] to their innermost essential reality; their Rabb).