Hanafi
The sources give no view for it here.
ذبح ولد الأضحية معها
هل يجب ذبح ولد الأضحية مع أمه؟
Each school’s answer
Hanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
وَلَدُ الأُْضْحِيَةِ: ٦٦ - اخْتَلَفَ الْفُقَهَاءُ فِي حُكْمِ ذَبْحِ وَلَدِ الأُْضْحِيَةِ، فَذَهَبَ بَعْضُهُمْ إِلَى أَنَّهُ يَجِبُ ذَبْحُهُ مَعَهَا، وَقَال آخَرُونَ بِعَدَمِ الْوُجُوبِ.
«الموسوعة الفقهية الكويتية» (Kuwait) entry «ولد» vol. 45 p. 213
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What bears this mark is in our words, our standard wording; the books’ texts stay as they are.