Maʿānī al-ʾAkhbār > The meaning of what was narrated with regards to that prayer is the waist cloth of Allah on earth
Hadith #1

حدثني محمد بن علي ماجيلويه - رضي الله عنه - عن عمه محمد بن أبي القاسم، عن أحمد بن أبي عبد الله، عن أبيه، عن محمد بن سنان، عن المفضل بن عمر، عن يونس بن ظبيان، قال: قال أبو عبد الله عليه السلام: اعلم أن الصلاة حجزة الله في الأرض، فمن أحب أن يعلم ما أدرك من نفع صلاته فلينظر فإن كانت صلاته حجزته عن الفواحش والمنكر فإنما أدرك من نفعها بقدر ما احتجز، ومن أحب أن يعلم ماله عند الله فليعلم ما لله عنده ومن خلا بعمل فلينظر فيه فإن كان حسنا جميلا فليمض عليه وإن كان سيئا قبيحا فليجتنبه فإن الله عز وجل أولى بالوفاء والزيادة، ومن عمل سيئة في السر فليعمل حسنة في السر ومن عمل سيئة في العلانية فليعمل حسنة في العلانية.

1. I was told by Muhammed bin Ali Majilawayh, may Allah be pleased with him, from his paternal uncle, Muhammed bin Abi’l-Qsem, from Ahmad bin Abi Abdillah, from his father, from Muhammed bin Sinan, from Mufaddal bin Umar, from Yunus bin Dhibyan, that he said: Abu Abdillah, peace be upon him, said: Know that prayer is the waist cloth [1] of Allah on earth. Hence, the one who would like to know what he has achieved from the benefit of his prayer, let him see. Thus, the one whose prayer is his waist cloth from obscenities and evil, he has only achieved from its benefit by the amount of what he has held to. The one who would like to know what he will have that is with Allah, let him know what Allah has that is with him. The one who secludes himself to perform a deed, let him look into it: if it is good and beautiful, let him continue upon it; and if it is bad and horrid, let him avoid it, for indeed, Allah, Exalted and Glorious is He, is more rightful of loyalty and addition. The one who performs a misdeed in secret, let him perform a good deed in secret, and the one who performs a misdeed in public, let him perform a good deed in public.