This is the record of that mercy of your Lord, which He showed to His bondman Zakaria.
A narration about your Lord's mercy towards His servant Zachariah.
A mention of the Mercy of your Lord to his worshiper Zachariah
A mention of the mercy of thy Lord to His servant Zacharias -
Your Lord's mercy mention (on) His worshipper/slave Zachary/Zacharias
Here is how your Lord showered his mercy upon his servant Zechariah
This is the remembrance of the mercy of your Lord upon His bondman Zakaria
This is an account of the mercy of thy Lord shown to HIS servant Zachariah
This is an account of the mercy of your Lord (bestowed) upon His (chosen) servant Zakariyya (Zacharias)
(This is) an account of the mercy of your Lord (shown) to His servant Zachariah
(This is) a mention of the mercy of your Lord to His slave Zakariya (Zachariah)