Zhouyi BenyiLine statement
已 (yǐ) is read with the fanqie of 夷 and 止 [meaning to stop/cease]. The three yang lines of Qian are restrained by Gen, so the inner and outer trigrams each take their respective meanings.
Nine at the Beginning is restrained by Six in the Fourth Place; therefore its divination is that going forth brings danger, and it furthers one to cease.