He narrated the tradition to the same effect, but he did not mention the words "until the age of eating". This version adds: Qatadah said: This is valid until the time they do not eat food; when they begin to eat, their urine should be washed.  

أَنَّ النَّبِيَّ ﷺ قَالَ فَذَكَرَ مَعْنَاهُ وَلَمْ يَذْكُرْ مَا لَمْ يَطْعَمْ زَادَ قَالَ قَتَادَةُ هَذَا مَا لَمْ يَطْعَمَا الطَّعَامَ فَإِذَا طَعِمَا غُسِلاَ جَمِيعًا  

the Messenger of Allah said, about urine of a male child that suckles: "The urine of the boy is sprinkled, and the girl's urine is washed." Qatadah (one of the narrators) said: "This is so, as long as they do not eat, when they eat, then both of them are washed."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ فِي بَوْلِ الْغُلاَمِ الرَّضِيعِ يُنْضَحُ بَوْلُ الْغُلاَمِ وَيُغْسَلُ بَوْلُ الْجَارِيَةِ قَالَ قَتَادَةُ وَهَذَا مَا لَمْ يَطْعَمَا فَإِذَا طَعِمَا غُسِلاَ جَمِيعًا  

ʿSprinkle water on the urine of a boy and wash the urine of a girl.ʿ Qatadah said: This applies so long as they are not eating solid food; if they are eating solid food, then it is to be washed in both cases.  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ فِي الرَّضِيعِ يُنْضَحُ بَوْلُ الْغُلامِ وَيُغْسَلُ بَوْلُ الْجَارِيَةِ قَالَ قَتَادَةُ وَهَذَا مَا لَمْ يَطْعَمَا الطَّعَامَ فَإِذَا طَعِمَا غُسِلا جَمِيعًا  

ʿSprinkle water on the urine of a boy and wash the urine of a girlʿ Qatadah said: This is so long as they are not eating solid food; if they are eating solid food, both are to be washed.  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ فِي الرَّضِيعِ يُنْضَحُ بَوْلُ الْغُلامِ وَيُغْسَلُ بَوْلُ الْجَارِيَةِ قَالَ قَتَادَةُ وَهَذَا مَا لَمْ يَطْعَمَا الطَّعَامَ فَإِذَا طَعِمَا غُسِلا جَمِيعًا