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Jabir reported God’s messenger as saying, “Do not invoke curses on yourselves, or on your children, or on your possessions lest you happen to do it at a time when God is asked for something and grants your requests.” Muslim transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ جَابِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تَدْعُوا عَلَى أَنْفُسِكُمْ وَلَا تدْعُوا على أَوْلَادكُم لَا تُوَافِقُوا مِنَ اللَّهِ سَاعَةً يُسْأَلُ فِيهَا عَطَاءً فَيَسْتَجِيبَ لَكُمْ» . رَوَاهُ مُسْلِمٌ
sunnah.com