Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:18847a
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السيوطي:١٨٨٤٧a

"مَا تَقَرَّب العَبْدُ إِلَى اللهِ بِشَيْءٍ أفْضَلَ مِنْ سُجُودٍ خَفيّ".  

ابن المبارك عن ضمرة بن حبيب مرسلًا، الديلمى عنه عن صهيب - ؓ

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Collected by Suyūṭī