From Wiktionary, the free dictionary
خَلَدْتُمْ • (ḵaladtum) (form I) /xa.lad.tum/
- second-person masculine plural past active of خَلَدَ (ḵalada)
خلدتم (form II)
- خَلَّدْتُمْ (ḵalladtum) /xal.lad.tum/: second-person masculine plural past active of خَلَّدَ (ḵallada)
- خُلِّدْتُمْ (ḵullidtum) /xul.lid.tum/: second-person masculine plural past passive of خَلَّدَ (ḵallada)