Narrated Ibn 'Abbas (RA):

Suckling applies only (to infants) during the first two years (of their life). [Reported by ad-Daraqutni and Ibn 'Adi as Marfu' (a saying of the Prophet) and Mawquf (a saying of a Companion). However, they both held that the stronger view is that it is Mawquf (i.e. saying if Ibn 'Abbas).

وَعَنِ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: { لَا رَضَاعَ إِلَّا فِي اَلْحَوْلَيْنِ } رَوَاهُ اَلدَّارَقُطْنِيُّ وَابْنُ عَدِيٍّ مَرْفُوعًا وَمَوْقُوفًا, وَرَجَّحَا اَلْمَوْقُوفَ [1]‏ .‏