难行(nán xíng) “hard practices” Cf. 苦行(kŭ xíng);
HD. 11.901a(宋代); DK. 11.1050a(法华经);
ps-L. 35b22.释迦如来于无量劫难行苦行，积功累德，求菩提(v.l. 萨[= J, FS etc.])道，未曾止息(p);
not found at K. 263.9; not found at Z. 106a4; STF. 197c23.勤苦;