From him, from Muhammad ibn Al-Fudayl, who said:
I asked the Righteous Servant (al Abd al Salih عليه السلام), peace be upon him, about the saying of Allah سبحانه وتعالى, the Mighty and Majestic: “Those who are heedless of their prayers” (Surah Al-Ma‘un 107:5). Imam عليه السلام said: “It means neglecting (and wasting) it.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 256