The Limits of Ablution, Its Order and Reward
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 11
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «إِذَا تَوَضَّأَ اَلرَّجُلُ فَلْيَصْفِقْ وَجْهَهُ بِالْمَاءِ فَإِنَّهُ إِنْ كَانَ نَاعِساً فَزِعَ وَ اِسْتَيْقَظَ وَ إِنْ كَانَ اَلْبَرْدُ فَزِعَ فَلَمْ يَجِدِ اَلْبَرْدَ.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: "'When a man performs ablution, let him splash his face with water, for if he is drowsy, it will awaken him, and if it is cold, he will not feel the cold.'".
- Ṣaḥīḥ al-Faqīh