But I'm only near it, man I need the pastor's service
I'm drowning cause I'm so tired of treading
So Lord when you get a second please

from Slaughterhouse (Ft. Skylar Grey) – Rescue Me Lyrics on Rap Genius


He’s just near the church (since he only passed by it) ‘cause he couldn’t muster the will to get in. Although he does need the pastor’s service, because he’s so tired of his life path leading him nowhere (treading water is stationary swimming) that he can’t stay on the surface anymore.
Thus asking the Lord for a miracle (this dawg wanna be jesusin' and shit) to rescue him from drowning, as linked to the hook.

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