Is there an example of deeds that people considered trivial but were counted among the major sins during the time of the Prophet (peace and blessings be upon him)?

Question:
In the statement of the Companion (may Allah be pleased with him): "We used to consider them among the major sins during the time of the Prophet (peace and blessings be upon him)." The question is: Is there an example of these deeds that people considered trivial, so that those people counted them as major sins during the time of the Prophet?

Answer:
Minor sins, minor sins. The minor sins were such that the Companions feared them so much that they treated them as if they were major sins, out of fear of them and out of reverence for the obedience of Allah (Mighty and Majestic). This is an increase in faith and a strength of faith, and a fear of Allah (Mighty and Majestic). They did not be lenient with minor sins. So if they did not be lenient with minor sins, what can be said about major sins? They were even more careful to avoid them. Yes.