The Chapters on Pre-emption

"‏ لاَ شُفْعَةَ لِشَرِيكٍ عَلَى شَرِيكٍ إِذَا سَبَقَهُ بِالشِّرَاءِ وَلاَ لِصَغِيرٍ وَلاَ لِغَائِبٍ ‏"

“There is no preemption for a partner when his co-partner has beaten him to it (in another deal before), not for a minor nor one who is absent.”