مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 294
Purification
Section 3
عَنْ جَابِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مِفْتَاحُ الْجَنَّةِ الصَّلَاةُ وَمِفْتَاحُ الصَّلَاة الطّهُور» . رَوَاهُ أَحْمد
Jabir reported God’s messenger as saying, “The key of paradise is prayer, and the key of prayer is being purified." Ahmad transmitted it.
Mishkat al-Masabih, 294ضَعِيف (الألباني)