Sahih al-Bukhari 3650 (Book 63, Hadith 38)

Narrated Qais bin Ubad: While I was sitting in the Mosque of Medina, there entered a man (Abdullah bin Salam) with signs of
solemnity over his face. The people said, “He is one of the people of Paradise.” He prayed two light
rak`at and then left. I followed him and said, “When you entered the Mosque, the people said, ‘He is
one of the people of Paradise.’ ” He said, “By Allah, one ought not say what he does not know; and I
will tell you why. In the lifetime of the Prophet (ﷺ) I had a dream which I narrated to him. I saw as if I
were in a garden.” He then described its extension and greenery. He added: In its center there was an
iron pillar whose lower end was fixed in the earth and the upper end was in the sky, and at its upper
end there was a (ring-shaped) hand-hold. I was told to climb it. I said, “I can’t.” “Then a servant came
to me and lifted my clothes from behind and I climbed till I reached the top (of the pillar). Then I got
hold of the hand-hold, and I was told to hold it tightly, then I woke up and (the effect of) the handhold
was in my hand. I narrated al I that to the Prophet (ﷺ) who said, ‘The garden is Islam, and the handhold
is the Most Truth-worthy Hand-Hold. So you will remain as a Muslim till you die.” The narrator
added: “The man was `Abdullah bin Salam.”