The Prophet ﷺ said: Do not say: "What Allah wills and so and so wills," but say: "What Allah wills and afterwards so and so wills. (Using translation from Abū Dāʾūd 4980)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَا تَقُولُوا مَا شَاءَ اللهُ وَشَاءَ فُلَانٌ وَلَكِنْ قُولُوا مَا شَاءَ اللهُ ثُمَّ شَاءَ فُلَانٌ  

[Machine] A Jewish person came to the Prophet ﷺ and said, "You both swear and commit shirk (associate partners with Allah). You say 'If Allah wills and you will,' and you also say 'By the Kaaba.' The Prophet ﷺ instructed them that when they want to swear an oath, they should say 'By the Lord of the Kaaba' and then say 'If Allah wills and you will.'"

Then, Ahmad bin Hafs narrated to us, saying: My father narrated to me from Ibrahim bin Tahman, from Mughira, from Ma'bad bin Khalid, from Qutayla, who was a woman from the Muhajirat (those who migrated from Makkah to Madinah) from Juhayna. She said, "A Jewish woman entered upon Aisha and said, 'You both commit shirk (associate partners with Allah).' And she narrated the rest of the story."  

أَنَّ يَهُودِيًّا أَتَى النَّبِيَّ ﷺ فَقَالَ إِنَّكُمْ تَنِدُّونَ وَإِنَّكُمْ تُشْرِكُونَ تَقُولُونَ مَا شَاءَ اللهُ وَشِئْتَ وَتَقُولُونَ وَالْكَعْبَةِ؟ فَأَمَرَهُمُ النَّبِيُّ ﷺ إِذَا أَرَادُوا أَنْ يَحْلِفُوا أَنْ يَقُولُوا وَرَبِّ الْكَعْبَةِ وَيَقُولُ أَحَدُهُمْ مَا شَاءَ اللهُ ثُمَّ شِئْتَ 10757 أَخْبَرَنَا أَحْمَدُ بْنُ حَفْصٍ قَالَ حَدَّثَنِي أَبِي قَالَ حَدَّثَنِي إِبْرَاهِيمُ بْنُ طَهْمَانَ عَنْ مُغِيرَةَ عَنْ مَعْبَدِ بْنِ خَالِدٍ عَنْ قُتَيْلَةَ امْرَأَةٍ مِنَ الْمُهَاجِرَاتِ مِنْ جُهَيْنَةَ قَالَتْ دَخَلَتْ يَهُودِيَّةٌ عَلَى عَائِشَةَ فَقَالَتْ إِنَّكُمْ تُشْرِكُونَ وَسَاقَ الْحَدِيثَ  

[Machine] A man came to the Prophet ﷺ and spoke to him. The man said, "Whatever Allah wills and whatever you will." The Prophet ﷺ said, "Woe to you! Did you make me equal to Allah? Say, 'Whatever Allah wills alone.'" This incident was different from the opinion of Ishaq ibn Yoonus.  

أَنَّ رَجُلًا أَتَى النَّبِيَّ ﷺ فَكَلَّمَهُ فَقَالَ مَا شَاءَ اللهُ يَعْنِي وَشِئْتَ فَقَالَ وَيْلَكَ أَجَعَلْتَنِي وَاللهَ عَدْلًا؟ قُلْ مَا شَاءَ اللهُ وَحْدَهُ خَالَفَهُ عِيسَى بْنُ يُونُسَ  

[Machine] A man came to the Prophet ﷺ and spoke to him about a matter. The man said, "What Allah wills and you will." The Prophet ﷺ asked him, "Do you make me equal to Allah? Say, 'What Allah wills alone.'"  

أَنَّ رَجُلًا أَتَى النَّبِيَّ ﷺ فَكَلَّمَهُ فِي بَعْضِ الْأَمْرِ فَقَالَ مَا شَاءَ اللهُ وَشِئْتَ فَقَالَ النَّبِيُّ ﷺ أَجَعَلْتَنِي لِلَّهِ عَدْلًا؟ قُلْ مَا شَاءَ اللهُ وَحْدَهُ