We believe that the Sirāt will be erected above Hellfire, and it will be slippery. People will pass over it in accordance with their deeds. It has hooks like As-Sa‘dān thorns, which will snatch people according to their deeds. The first to cross this bridge will be our Prophet Muhammad (may Allah's peace and blessings be upon him). Abu Hurayrah (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said: "On the Day of Resurrection, people will be gathered and He will order the people to follow what they used to worship. Some of them will follow the sun, some will follow the moon, and some will follow other deities; and only this Ummah will be left, along with its hypocrites. Allah will come to them and say: 'I am your Lord.' They will say: 'We will stay in this place till our Lord comes to us and when our Lord comes, we will recognize Him.' Then, Allah will come to them again and say: 'I am your Lord.' They will say: 'You are our Lord.' Allah will call them, and the Sirāt will be laid across Hellfire, and I will be the first amongst the messengers to cross it with my Ummah. Only the messengers will be able to speak on that Day, and they will be saying: 'O Allah, save us. O Allah, save us!'" [Narrated by Al-Bukhāri (806), Muslim (182), Abu Dāwūd (4730), At-Tirmidhi (2554), and Ibn Mājah (178)]
Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported: The Prophet (may Allah's peace and blessings be upon him) said: "Then, the bridge will be laid across Hellfire." We said: "O Messenger of Allah, what is the bridge?" He said: "It is a slippery bridge on which there are clamps and hooks like a thorny seed that is wide at one side and narrow at the other and has thorns with bent ends. Such a thorny seed is found in Najd and is called As-Sa‘dān. Some of the believers will cross the bridge as quickly as the blink of an eye, some others as quickly as lightning, a strong wind, fast horses or she-camels. So some will be safe without any harm; some will be safe after receiving some scratches, and some will fall down into Hellfire. The last person will cross by being dragged all the way." [Narrated by Al-Bukhāri (7439)]
In another Hadīth, the Prophet (may Allah's peace and blessings be upon him) said: "And on the sides of the Sirat hooks will be suspended ready to catch those it will be ordered to catch. There will be those who suffer scratches and be saved and others who will pile up in Hellfire." [Narrated by Muslim (195)]
Abu az-Zubayr related that he heard Jabir ibn ‘Abdullāh (may Allah be pleased with him) who was asked about the arrival of people on the Day of Resurrection, and he said: "We will come on the Day of Resurrection like this and like that... Then, the people will be summoned along with their idols whom they worshiped, one after another. Then, our Lord will come to us and say: 'Who are you waiting for?' They will say: 'We are waiting for our Lord.' He will say: 'I am your Lord.' They will say: '(We are not sure) till we look at You.' He will manifest Himself to them smiling, and will go along with them and they will follow Him; and everyone, whether a hypocrite or a believer, will be endowed with a light, and there will be spikes and hooks on the bridge of Hellfire, which will catch hold of those whom Allah wills. Then, the light of the hypocrites will be extinguished, and the believers will attain salvation." [Narrated by Muslim (191)]
When the believers pass the Sirāt and are saved therefrom, they will be held over a vault between Paradise and Hellfire. Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said: "The believers, after being saved from Hellfire, will be stopped at a bridge between Paradise and Hellfire and mutual retaliation will be established among them regarding wrongs they have committed in the world against one another. After they are cleansed and purified, they will be admitted into Paradise; and by Him in Whose Hand Muhammad's soul is, everyone of them will know his dwelling in Paradise better than he knew his dwelling in this world." [Narrated by Al-Bukhāri (6535)]