hadith
4597
۞
The Prophet (SAWA) said, ‘Worship performed while having consumed unlawful food is like a building built on sand. [or on water according to other narrations]
رسولُ اللهِ (صَلَّيَ اللهُ عَلَيهِ وَ آلِهِ): العِبادَةُ مَعَ أكلِ الحَرامِ كالبِناءِ عَلَى الرَّملِ ، وقيلَ :عَلَى الماءِ .