Two things that are never accepted
Stated as a pair, and the second one is about money.
لاَ تُقْبَلُ صَلاَةٌ بِغَيْرِ طُهُورٍ وَلاَ صَدَقَةٌ مِنْ غُلُولٍ
No prayer is accepted without purification, and no charity from wealth taken dishonestly.
The full narration
It was narrated from Simak bin Harb, that Mus'ab bin Sa'd said:'" 'Abdullah bin 'Umar came to visit Ibn 'Amir when he was sick and he said: 'Won't you supplicate to Allah for me, O Ibn 'Umar ?' He said: 'I heard the Messenger of Allah (ﷺ) say: "No Salat is accepted without Wudu' (purification), and no charity (is accepted) that comes from Ghulul [1] " and you were the governor of Al-Basrah.' " [1] Goods pilfered from the spoils of war prior to their authorized distribution
Source
Ṣaḥīḥ Muslim · 535
Ṣaḥīḥ
- Agreed upon as authentic (al-Bukhārī / Muslim)