لِحَيَاتِي

لِحَيَاتِي is a phrase (شِبْهُ الجُمْلَةِ) consisting of a genitive particle and a possessive nominal compound

PhraseParticle / Noun / NounNounNoun Particle
شِبْهُ الجُمْلَةِجَارٌ وَمَجْرُوْرٌ وَهُوَ مُضَافٌ وَ مُضَافٌ إِلَيْهِمُضَافٌ إِلَيْهِاسْمٌ مَجْرُوْرٌ وَهُوَ مَضَافٌحَرْفُ جَرٍّ
PhraseCompoundPossessive NounGenitive noun + Noun possessedParticle of pulling down
  
for my lifeلِحَيَاتِي=ي+حَيَاتِ+لِ
this life of mineminelife offor
Surah/Below is the only verse in the holy Quran containing the phraseلِحَيَاتِي
Verse
89-24He will say “Alas would that I had sent forth (good deeds) for my life (hereafter)يَقُوْلُ يَالَيْتَنِى قَدَّمْتُ لِحَيَاتِى