Hadith
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا خَالِي، يَعْلَى عَنِ الأَعْمَشِ، عَنْ سَالِمِ بْنِ أَبِي الْجَعْدِ، عَنْ جَابِرٍ، قَالَ جَاءَ رَجُلٌ مِنَ الأَنْصَارِ إِلَى النَّبِيِّ ـ صلى الله عليه وسلم ـ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ لِي جَارِيَةً أَعْزِلُ عَنْهَا قَالَ " سَيَأْتِيهَا مَا قُدِّرَ لَهَا " . فَأَتَاهُ بَعْدَ ذَلِكَ فَقَالَ قَدْ حَمَلَتِ الْجَارِيَةُ . فَقَالَ النَّبِيُّ ـ صلى الله عليه وسلم ـ " مَا قُدِّرَ لِنَفْسٍ شَىْءٌ إِلاَّ هِيَ كَائِنَةٌ " .
It was narrated that Jabir said:"A man from among the Ansar came to the Prophet (ﷺ) and said: 'O Messenger of Allah (ﷺ), I have a slave girl. Should I do 'Azl (coitus interruptus) with her?' He said 'Whatever is decreed for her shall come to her." He (the Ansari) came to him later on and said: "The slave girl has become pregnant." The Prophet (ﷺ) said: "Nothing is decreed for a person but it will surely come to pass
Sahih · Al-Albani
Sunan Ibn Majah 89·Also available on sunnah.com·