Hadith: Whoever meets Allah without associating anything with Him, no sin will harm him along with it; and whoever dies while associating partners with Him, no good deed will benefit him along with it

عَنْ عَبْدَ اللهِ بْنِ عَمْرٍو رَضيَ اللهُ عَنْهُمَا يَقُولُ: قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ:
«مَنْ لَقِيَ اللهَ لَا يُشْرِكُ بِهِ شَيْئًا لَمْ تَضُرَّهُ مَعَهُ خَطِيئَةٌ، وَمَنْ مَاتَ وَهُوَ يُشْرِكُ بِهِ لَمْ يَنْفَعْهُ مَعَهُ حَسَنَةٌ».
[صحيح] - [رواه أحمد] - [مسند أحمد: 6586]

‘Abdullah ibn ‘Amr (may Allah be pleased with him and his father) reported: The Messenger of Allah (ﷺ) said:
"Whoever meets Allah without associating anything with Him, no sin will harm him along with it; and whoever dies while associating partners with Him, no good deed will benefit him along with it."
[Authentic hadith] - [Narrated by Ahmad] - [Musnad Ahmad - 6586]

Explanation

The Prophet (ﷺ) informed that whoever dies and meets Allah as a monotheist—without associating anything with Him—will be among the people of Paradise, even if he is punished for his sins in Hellfire first. But whoever dies while associating partners with Allah, no good deed will benefit him, and Paradise is forbidden for him.

Benefits from the Hadith

1. A warning against Shirk (polytheism), for it is the gravest of all sins and misdeeds, and Allah does not forgive it.
2. The virtue of Tawhīd (monotheism), and it is a cause for entering Paradise, even if the person is punished first.
3. The importance of remaining steadfast upon Tawhīd until death, and avoiding what contradicts it, namely Shirk.