Kitāb al-Muʾmin
Hadith 4141 - وعن أبي عبد الله (ع) قال إنّ الحواريّين شكَوا إلى عيسى ما يلقَونَ من الناسِ وشدّتهم عليهم، فقال: إنّ المؤمنينَ لم يزالوا مبغَضين وإيمانُهم كحَبَّة القَمح ما أحلى مذاقَها وأكثرَ عذابها.
41. It is narrated that Abu 'Abd Allah (a.s) said: The disciples of 'Isa (Prophet Jesus (a.s)) complained to him about what they were suffering at the hands of others. He said to them, 'Believers have always been despised. Their faith is like a wheat kernel - how sweet its taste is but how severe its treatment (in the process of purification) is!'