٣٣٧. وَقَالَ (عليه السلام): الدَّاعِي بِلاَ عَمَلٍ كَالرَّامِي بِلاَ وَتَرٍ.
337. Amīr al-mu’minīn, peace be upon him, said: He who prays but does not exert effort is like the one who shoots without a bow-string.
Prayer without effort is futile as bowless archery
Nahj al-Balāgha|Volume 1|Book 3|Chapter 337