Volume 1, Number 42:
Narrated Anas: The Prophet (salla llahu alayhi wa sallam)said,
"Whoever said "None has the right to be worshipped but Allah and has
in his heart good (faith) equal to the weight of a barley grain will
be taken out of Hell. And whoever said: "None has the right to be
worshipped but Allah and has in his heart good (faith) equal to the
weight of a wheat grain will be taken out of Hell. And whoever
said, “None has the right to be worshipped but Allah and has in his
heart good (faith) equal to the weight of an atom will be taken out
of Hell.”
(Sahih Bukhari)
“I put my trust in Allah, my Lord and your Lord! There is not a moving creature, but He has a grasp of its forelock. Verily, my Lord is on the straight path. (The truth)”
(11:55-56)