(Surah Waqiah 56...
(Surah Waqiah 56:88-89) If a person who is dying is from the proximate ones then for him there is ‘happiness’ meaning comfort or the evening breeze of Paradise and ‘bounty’ which means the pure sustenance or the flowers of Paradise which are brought to him that he may smell it and acquire the blessings and (thirdly) there is Paradise for him containing all the bounties. The Prophet (S) said that this verse is revealed in praise of Amirul Momineen (a.s.) and Imams succeeding him.
Amirul Momineen (a.s.) is quoted in Uyoon Akhbar Ridha that he said: The verse revealed And the foremost are the foremost was revealed in my praise. Also there is a tradition in the book of Sulaym Ibne Qays Hilali that this verse is in praise of Amirul Momineen (a.s.). It is of those proofs which he completed for Muhajirs and Ansars, and said that I put you under the oath of Allah do you know when was the following verse revealed?
He replied that Allah has revealed them in praise of the Prophets and their successors and I am the best of all the Prophets and Ali Ibne Abi Talib, my successor is the best of all the successors. The people said: Indeed, we have heard it.
Shaykh Tabarsi in Majmaul Bayan narrates from Imam Muhammad Baqir (a.s.) that four people are the foremost: The first is Habeel, son of Adam (a.s.) who was killed, the second is from the Ummat of Moosa, called believer of the people of Firon, the third is from the community of Isa called Habib Najjar and the fourth from the Ummah of Muhammad (S), Ali Ibne Abi Talib (a.s.) Kulaini has narrated that Imam Muhammad Baqir (a.s.) told a group of Shias that you are the Shias of Allah, you are the helpers of Allah and you are the first of the foremost and the last of the foremost, foremost in the world and you are the foremost in the hereafter to go to Paradise.
For you Allah has given the guarantee and also the Holy Prophet (S) has guaranteed Paradise for you.