Source: Player's Handbook II
You create a channel of divine energy between yourself and a willing ally. This link allows you to cast your spells upon him from greater than normal range.
Prerequisite: Ability to turn or rebuke undead.
Benefit: Once every 24 hours, you can spend 10 minutes creating a magical ward between you and one willing target. For the rest of the 24-hour period, you can increase the range of a touch spell to short range (25 feet + 5 feet per two caster levels) if you target the warded creature, and only the warded creature. When you cast a spell in this manner, you must expend a turn or rebuke undead attempt.
You can create a ward between you and more than one target, so long as you expend the necessary time and turning attempts. You must expend a turn or rebuke undead attempt to create each ward beyond the first.