Man Lā Yaḥḍuruh al-Faqīh
Hadith 3871958 - وَ سَأَلَ سَمَاعَةُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ : عَنِ اَلسَّحُورِ لِمَنْ أَرَادَ اَلصَّوْمَ فَقَالَ «أَمَّا فِي شَهْرِ رَمَضَانَ فَإِنَّ اَلْفَضْلَ فِي اَلسَّحُورِ وَ لَوْ بِشَرْبَةٍ مِنْ مَاءٍ وَ أَمَّا فِي اَلتَّطَوُّعِ فَمَنْ أَحَبَّ أَنْ يَتَسَحَّرَ فَلْيَفْعَلْ وَ مَنْ لَمْ يَفْعَلْ فَلاَ بَأْسَ.
Hadith.1958 - Sama'ah asked Abu Abdullah (as) about suhoor for someone intending to fast.
Imam (as) said: "As for the Month of Ramadan, it is recommended to have suhoor, even if it is just a sip of water. As for voluntary fasting, whoever wishes to have suhoor may do so, and whoever does not, there is no harm."