There is no harm if they wean the child by mutual consent and consultation. Moreover, there is no harm if you choose to give your children a suckle by a wet nurse, provided that you pay her fairly.
Kuma idan, kun yi nufin ku bãyar da ɗiyanku shãyarwa, to, bãbu laifi a kanku idan kun mĩƙa abin da kukazo da shi bisa al'ãda. Kuma ku bi Allah da taƙawa.