Is there any deed that guarantees entry into Paradise and salvation from Hellfire?

Whoever fulfills what Allah has obligated upon him will enter Paradise and be saved from Hell, as indicated by the Hadith of the Bedouin who asked the Prophet, peace and blessings be upon him, about the obligatory duties. The Prophet said to him: "He has succeeded if he is truthful," or "He will enter Paradise if he is truthful." It is not permissible to abandon the obligatory duties on the pretext that a single act is sufficient for entering Paradise. There are various deeds mentioned in the Hadiths as reasons for entering Paradise, including:

- Counting the Beautiful Names of Allah (99 names): "Indeed, Allah has ninety-nine names, whoever enumerates them will enter Paradise."

- Reciting Sayyid al-Istighfar (the master of seeking forgiveness) with certainty: "O Allah, You are my Lord, there is no god but You... Whoever says it during the day with certainty and dies on that day before evening, he will be among the people of Paradise. And whoever says it during the night with certainty and dies before morning, he will be among the people of Paradise."

- Worshipping Allah and not associating partners with Him, establishing prayer, giving zakat, fasting Ramadan, and performing Hajj to the House, as stated in the Hadith of Mu'adh ibn Jabal when he asked the Prophet, peace and blessings be upon him, about a deed that would admit him to Paradise and distance him from Hellfire.

In addition to this, there are other doors of goodness, such as charity, which extinguishes sin, a man's prayer in the depths of the night, and guarding the tongue, which is the key to all matters.