Which of the following Sections of the Code of Civil Procedure deals with stay of suit?

Section 10 of the Code of Civil Procedure (res sub judice) requires a court to stay the trial of a later suit where the matter in issue is directly and substantially in issue in a previously instituted suit between the same parties pending in a competent court. It bars the trial, not the institution, of the later suit. Section 12 deals with the bar to a further suit, section 13 with foreign judgments and section 16 with suits relating to immovable property.