He asked the Prophet about a man who approached his wife, but did not ejaculate. He said: "If anyone of you finds that, he should sprinkle water over his private part (meaning he must wash it) and perform ablution."
أَنَّهُ سَأَلَ النَّبِيَّ ﷺ عَنِ الرَّجُلِ يَدْنُو مِنِ امْرَأَتِهِ فَلاَ يُنْزِلُ قَالَ إِذَا وَجَدَ أَحَدُكُمْ ذَلِكَ فَلْيَنْضِحْ فَرْجَهُ يَعْنِي لِيَغْسِلْهُ وَيَتَوَضَّأْ
[Machine] He asked the Messenger of Allah ﷺ about a man who approaches his wife and experiences sexual discharge. He said, "If someone experiences that, let him wash his private parts and perform ablution for prayer."
أَنَّهُ سَأَلَ رَسُولَ اللهِ ﷺ عَنِ الرَّجُلِ يَدْنُو مِنَ امْرَأَتِهِ فَيُمْذِي؟ قَالَ إِذَا وَجَدَ ذَلِكَ أَحَدٌ فَلْيَنْضَحْ فَرْجَهُ قَالَ يَعْنِي يَغْسِلُهُ وَلْيَتَوَضَّأْ وُضُوءَهُ لِلصَّلَاةِ