give_pious_type_reward_effect

give_pious_type_reward_effect = {
	if = {
		limit = { 
			has_trait = pilgrim #This should be awarded upon arrival from your first pilgrimage
			has_trait_xp = {
				trait = pilgrim
				value < 100
			}
		}
		if = {
			limit = { has_character_flag = perfect_pious_reward }
			add_trait_xp = {
				trait = pilgrim
				value = 40
			}
		}
		if = {
			limit = { has_character_flag = high_pious_reward }
			add_trait_xp = {
				trait = pilgrim
				value = 20
			}
		}
		if = {
			limit = { has_character_flag = mid_pious_reward }
			add_trait_xp = {
				trait = pilgrim
				value = 10
			}
		}
		if = {
			limit = { has_character_flag = low_pious_reward }
			add_trait_xp = {
				trait = pilgrim
				value = 5
			}
		}
	}
}

As written in game/common/scripted_effects/00_pilgrimage_effects.txt.