Rare Prayers
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 88
وَ رَوَى عِمْرَانُ اَلْحَلَبِيُّ عَنْهُ أَنَّهُ قَالَ: «يَنْبَغِي تَخْفِيفُ اَلصَّلاَةِ مِنْ أَجْلِ اَلسَّهْوِ.
Imran Al-Halabi narrated from Imam عليه السلام that He said: "It is recommended to lighten (shorten) the prayer because of forgetfulness."
- Ṣaḥīḥ al-Faqīh, p. 75