Mishkat al-Masabih 4 Prayer كتاب الصلاة 28

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: ” تِلْكَ صَلَاةُ الْمُنَافِقِ: يَجْلِسُ يَرْقُبُ الشَّمْسَ حَتَّى إِذَا اصْفَرَّتْ وَكَانَتْ بَيْنَ قَرْنَيِ الشَّيْطَانِ قَامَ فَنَقَرَ أَرْبَعًا لَا يَذْكُرُ اللَّهَ فِيهَا إِلَّا قَلِيلا ” . رَوَاهُ مُسلم

He reported God’s Messenger as saying, “This is how a hypocrite prays: he sits watching the sun, and when it becomes yellow and is between the horns of the devil, he rises and prays four rak’as quickly, mentioning God seldom during them.” Muslim transmitted it.