法華義疏 7.158

7.158

領教權實中已明說二乘法窮子修行，今隱本垂迹明教作人義，故誡勸也。

In the section on apprehending the expedient and real teachings, it has already been clarified that expounding the Dharma of the two vehicles is the poor son's practice. Now, concealing the fundamental and manifesting the trace explains the meaning of teaching the laborers, hence he admonishes and encourages.