Due to the ubiquity of plagiarism detecting software, the number of accusations of plagiarism from authors with published papers is increasing.
When citing other papers, do not copy verbatim. Paraphrase, adapting the wording to your own manuscript. Even when citations are referenced and original authors’ names are given, the original text should not be copied.
Especially, when describing already published “Methods,” note only the essential details or differences: Do not write detailed methods replicating the original text.
Similar attention must be given to citations of your own papers.